Intermittent misfire no codes Sep 3, 2015 · Always begin any intermittent misfire diagnosis by using your professional scan tool to retrieve misfire codes and freeze-frame data. 4 litre. has code p0134. Vehicle also had exhaust manifold/converter assembly replaced at that time and the rear… Dec 8, 2013 · Hey guys, I'm stumped. 3. I have had it at a shop twice having them hook their computer that graphs the cylinders out. Thread starter gcamp12; Start date Aug 4 Random Misfire, No Codes Mercury; Nov 16, 2023; TJ General Discussion; 4 5 6. No codes logged since owning, other than cam and crank sensor. Jun 26, 2014 · My 2005 f150 has an intermittent misfire. I've been experiencing some random misfire lately on my '02 5. I’m still using non ethanol gas. 4l: Since you have replaced the plug & coil, other things to check are the harnesses & connectors to the coil & the injector. An intermittent misfire on #1 2. Feb 12, 2020 · It got so bad that eventually it tripped a P1374 code (misfire in cylinder 3). ) Without the scan tool, I'd think the car is driving totally fine - it feels smooth both on the road and at idle - and no codes. Get yourself a cheap $25 code reader and try to scan the codes while it’s happening. Certain codes will reset themselves if the problem doesn’t occur for a certain amount of time or engine starts. The car is running very rich, idling at 640rpm, running rough, think it's dropping a cylinder, but no fault codes. Nov 8, 2012 · The ECM would be able to detect it and trigger the Misfire count for the appropriate cylinder. Seems fine at idle. I put up a thread on here yesterday to see if anyone could offer some insight on a rough idle with misfire code and no answers back yet. I think it is the Throttle Body (TB) based on the erratic TB% The TB% would go from 24-26% to 56-58% with no movement in the throttle. Jul 19, 2015 · Intermittent Misfire - Continuing Saga Still have the problem. The fuel gauge may be faulty. But stored up to 100+ misfires. p0301. In this Tool Briefing we will discuss a multiple-symptom issue (with no codes), and which tools you can use to determine the cause and correct the issue. It stopped when I started up again on my way home and no codes were in memory. Remember that these trucks go very lean at cruise, and the timing advances a lot. Cleared the code and it has not come back, however the random misfires continue. Read Subaru Specific CEL's - Read Engine Data, Perform Adjustments & System Functional Tests May 29, 2016 · 99 3. So, next I threw some Seafoam in for good measure and because I sometimes believe in magic. I have a replacement coil, I just haven't installed it yet. Since there are no other codes, the one thing in my mind that could be an issue is the crankshaft position sensor. I then moved them around to see if the misfire followed. I have changed all spark plugs, and have had the fuel pump replaced (even though it was not bad). 17 mph 60ft 1. It feels like a misfire, but no check engine light and no codes. jcraig1866. Other solution is to buy one new COP and install on #1 cylinder. It's not noticeable during cold start but I'm fairly certain that's because the higher RPMs mask it. This might tell you which one is going or if you have a known good one check the resistance on it with a multi meter and compare with the coils in your own car, the resistance should be similar across Oct 24, 2007 · Intermittent misfire? but NO CODES?? 5. Mostly not felt, some yes at highway speeds. Nov 26, 2016 · Only when driving normally street or highway from 40-70 MPH and RPMs drop to 1500 +/-. I'm getting some intermittent misfires when at idle when in Park and also when the car the car is in Drive stopped at a redlight/stop sign with the brake pedal depressed. dsl100 TYF Newbie. Driving away from job misfire seemed less pronounced but light stayed. Do me a favor. While driving, it will occasionally feel like it stumbles/misfires for a split second then right back to normal. M. Seems to happen mostly while towing 8K TT up grades but, occasionally on flat ground as well. 691 da 3500 2016 Silver Hellcat 6sp. Nothing seems to have worked. If your mechanic can chart the sensors behavior, he might be able to see if they are bad. Customer: ford territory 2004 intermittent misfire no codes new plugs coils, head replaced 2 years ago Mechanic's Assistant: Have you seen the misfire code before? Has the car been stalling? Customer: no Mechanic's Assistant: What is the model of your '04 Ford? Customer: territory 2wd Mechanic's Assistant: Are you fixing your vehicle yourself Nov 4, 2016 · Hi guys. 86,000 miles and a great runner (till now). No glowing, no sounds. I'm somewhat capable of performing most routine maintenance, but chasing misfires isn't my something I do everyday. A lean A/F ratio needs a very good ignition. 2) Dirty Port. Jun 1, 2018 · In this video I show you how to diagnose a "no code" misfire on a 2008 Mercury Sable 3. . Jun 7, 2022 · Intermittent misfire on cylinder 6. Mar 10, 2022 · Codes P0089, P0087 and P2626 were showing but no engine check light. History - first noticed it last Apr 5, 2014 · ok, this is gonna be kinda long, but i felt the need to share. I got it as a short block and had my heads worked and put them on and then put the engine in. It's been a while since I've been on this site. 5MPG to no better than 13. Jul 21, 2012 #4 D. no light or code. Seems to do it then clears up once warmed up, had it plugged in and data logged, doesn't show any codes or issues in the data. I'll be riding down the road and the engine will just sort of cut out for a split second. New lambda. Nov 8, 2007 · Sure enough, the shop hooked up the ECU to their machine and got a cylinder 3 misfire code. The model is the 1. Went to auto parts store and got 8 new coil packs ( Standard Auto UF743) and 8 new plugs (AC Delco 12622441). I suspect I might have a coil that acting up. Pushed the Mar 16, 2023 · As such, you will not be able to read stored codes. 4, developed a "random misfire". It accelerates with little to no misfires, but when cruising on interstate car has slight jecky motion where if i had pushing the gas off and on. No engine light, no codes on vcds. I've got a 2003 dodge ram 1500 with the 5. Next day went to see what was going on and diagnose, and it started right up and ran fine, and has been running fine since. Oct 3, 2011 · I pulled the codes and got several misfire codes and ignition coil faults on #5,6 and 7 cylinder. Nov 14, 2018 #1 Hi Mar 21, 2016 · Lately it's developed this intermittent misfire behavior where it will buck and lose power momentarily and then act as if nothing happened. Sounded fine, light stayed on. There are no lights on or codes stored. Kept driving and it finally threw a code which tells you which one. suspecting a potential broken wire that could be making an intermittent Jan 2, 2025 · Went out to leave for work and it was misfiring like crazy. Janeylou New member. Engine light came on. plugs have been changed and b1s1 o2 has been changed. No check engine codes. Apr 2, 2011 · Seems like I have an intermittent cylinder misfire / hesitation. 0 intermittent misfire, no codes gcamp12; Aug 4, 2024; TJ General Discussion; Replies 2 Views 221. Visually check the fuel tank for fuel. They could be there, but you will not access them. Spark plugs are new and look in good condition. It is a bone stock 2000 AC 4X4 with about 175,000 on the clock. Mar 20, 2022 · Totally normal range. I had an intermittent issue once when it got pretty hot outside, but went away after driving about a mile to a store. Aug 17, 2016 · However when I had it read again, it came up with a P0300. On first trip, cylinder 8 reported the most misfires. 0 intermittent misfire, no codes gcamp12; Aug 4, 2024; TJ General Discussion; Replies 2 Views 220. Even without a fault code, there are different ways to tell if your car is misfiring. Jun 29, 2012 · Ran it on the job (running pto at 1382 rpm) all day. Mayyyybe a little sticky feeling, but barely. If it’s intermittent I would try coils. It is running good except it has a misfire in one of the cylinders. I popped the famous P0304 (cylinder #4 misfire) and have since swapped plugs, cops, pcv valve assy, all 4 O2 sensors, cleaned the MAF and moved around some of the injectors. This was an issue a year or so ago but went away completely so I pushed it under the rug. Aug 23, 2011 · Intermittent misfire or shudder. Nov 22, 2024 · Some misfire complaints are a flashing check engine light, and a P0300 to P0312 diagnostic trouble code (DTC) indicates that one or more cylinders are misfiring. The problem seemed to fade away. 30. No obvious difference. Got a new coilpack and swapped each cylinder. A common symptom of a misfiring car is a decrease in power and efficiency. Popped in 3 known good coils in these 3 cylinders with no difference. 2009 Tribeca Now - 2004 Outback EJ259 - Sold Jul 10, 2021 · Although it still makes no sense the ECU never threw a misfire code. See full list on underhoodservice. Also a few misfires reported from cylinder 2. Any Oct 24, 2007 · Intermittent misfire? but NO CODES?? 1997 - 2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion Yes, a coil can be the issue. I first replaced the spark plugs with those of appropriate gaps the stock delco plugs in fact gapped at 0. However after it warms up a little the engine misfires when I come to a stoplight and it also misfires when I am cruising on the highway at around 2100 rpm. 8K views 5 replies 2 participants last post by Allan 2019 RT Jan 21, 2020 Feb 8, 2016 · I have 60k on mine, and had a misfire not throwing a code. 6/9 - Second occurrence, no code after checking with own OBD2 reader after getting home. I'm thinking what might cause a loss of power and no code. any ideas? Jun 12, 2017 · P0305 - 35-10 - Misfire Detected - Intermittent 16687 - Cylinder 3 P0303 - 35-10 - Misfire Detected - Intermittent With old codes cleared no codes showing now Feb 19, 2015 · Please help. The upstream O2 sensor, HP fuel pump and fuel rail pressure sensor have been changed. Aug 17, 2020 · It was definitely a misfire just couldn't figure out what caused it. No codes have been thrown, ever. Intermittent misfire, no codes, spark plugs & Crank sensor just replaced, throttle body & MAF cleaned, 123k miles on car. Nov 9, 2019 · Due to factors beyond the control of RB The Mechanic, it cannot guarantee against unauthorized modifications of this information. So the codes after I swapped the coil were P0300, P0305, and P0306. If you are able to fix your issue, please post with the fix. 150-145PSI on all cylinders for compression test. When I check for diagnostic codes I'm seeing nothing, but when I read real time Nov 29, 2024 · 98 TJ 4. Now a few weeks later I'm noticing at cruising speeds little 'burps'. This morning it got bad so I let up on the pedal (cruising at 40mph) and it went a way. I also attempted to clear the keep alive memory by disconnecting the battery for an hour, don't know if this worked but it did zero all the average fuel economy data. The CKP is able to determine crankshaft speed differences between cylinder ignition events. My problem is a bad (and getting worse) intermittent misfire, especially @ 1500-2000 rpm under load, but also can feel it at idle. No errors on the dash and no changes made to the car. No check engine light or active/pending codes. There are no codes. are you Customer: ford territory 2004 intermittent misfire no codes new plugs coils, head replaced 2 years ago Mechanic's Assistant: Have you seen the misfire code before? Has the car been stalling? Customer: no Mechanic's Assistant: What is the model of your '04 Ford? Customer: territory 2wd Mechanic's Assistant: Are you fixing your vehicle yourself Apr 6, 2011 · When the vehicle is first started the engine runs fine. Can someone share some advise on how to test Jul 27, 2020 · Yet the dealer can get it to duplicate, nor have I been able to drive around with a tech and get it to happen. 0 intermittent misfire, no codes. Never lit the CEL. Feb 27, 2013 · problem now is, while I do have a misfire and 22611AL352 seems to be for some warm-up misfire issue, I don't have the associated P0030 DTC. Dec 13, 2024 · 3rd Gen: 3rd owner - 2007 maroon EX 270,000m (will trade for RA3!) 2nd Gen: 3rd owner - 2002 grey EXL 203,000m - 2nd owner - 1999 grey EX 200,000m Jul 1, 2019 · 5/28 - First occurance, took immediately to Dealer #1, no code found at the dealership. The fuel charge based on a misfire is ejected into the exhaust because it is not burned as completely as designed. Its not throwing any codes It’s been running fine all winter and spring. Also, my fuel economy went from my typical 17. This is the easiest misfire to diagnose. two weeks ago, I hit a turn pretty hard, and the car started sputtering, and threw a misfire code. Sep 11, 2014 · I'm having an intermittent "misfire" or "hiccup" that I can't figure out. But, what if there are no codes and a misfire is intermittent? This is where it gets complicated. Pushed the Apr 29, 2019 · Running extremely rich, intermittent misfire, low idle. Repair: Troubleshoot any active codes before continuing with this procedure. Compression test revealed 420 psi Aug 4, 2024 · 98 TJ 4. 5MPG. Jun 27, 2022 · Intermittent misfire/stumble, no codes on OBD Jump to Latest 4. Common Causes of Misfires. Swapped out coil, spark plugs, and tested each cylinder by disconnecting the coils one by one (all behaved the same), then cleared the codes. Oct 18, 2014 · It is experiencing a misfire on cylinder 2 quite a bit under load. 0 issues, shortly after putting on straightpipes, I started noticing a slight misfire break up under medium accelaration or cruising at highway speeds when I come to even a slight hill. no code for any particular cylinder, my code reader has misfire data shows 1,3,5,7 cyl misfires. No CEL, no codes. ) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and Mar 12, 2017 · Hello All, I have had an intermittent single cylinder misfire for around 300 miles now and have gone through certain procedures to try and get it running correctly again. The truck did not display a CEL, but it did throw a P0300 (random or multiple cylinder misfire) code when checked with my code reader. When you plug in the scanner but receive no codes, the scanner port could be dirty. Sep 15, 2022 · Accumulated Misfire - No Codes Jump to Latest 3. I have an intermittent misfire on my 180 (one cylinder definitely not firing at times) when I put my foot down. Cylinder 1 also misfires about 1/4th as much on similar pulls. Aug 24, 2015 · Some of the same issues here as well. Feb 8, 2024 · I guess I'd start where I always do with specific cylinder misfires. After clearing the code, I swapped the coil with cylinder's 1 and 3 to see if the problem would follow the coil. i have cleaned the Dec 26, 2020 · The short version is my scan tool is currently seeing intermittent misfires (~1. 2015 RAV4 Limited AWD, ASA44L-CNTGKA, Tech Pkg, Barcelona Red, 122k miles Apr 6, 2010 · The next day it happened enough that the Service Engine Soon light started blinking so I knew I had a misfire. 7 Tundra. After I cleared those codes, no misfire codes have returned, and it still continues to occur. i have a misfire as well on my 06 3. Also at times I get a lot of intermittent loud engine clatter. Replaced sensors and it was all better. I have a liquid TT which isn't showing any problems. 1983 - 2012 Ranger & B-Series All Ford Ranger and Mazda B-Series models 99 3. Dec 8, 2015 · Any tips on curing an intermittent misfire on my 350 HR? It seems to happen randomly, but always at low speeds and often when the car is cold. 2K views 14 replies 4 participants last post by craig baconator Jul 12, 2021 Feb 13, 2021 · 2004 - 2008 Ford F150 - Misfire, no codes - My 2006 F150, 4. My Insight is showing no codes, my ICP pressure is 600 at idle and when cruising around 1200 or so. No audible clicking noise while running. Of note, no misfire, roughness, or hesitation was physically felt during any of the reported misfires. Nov 14, 2018 · Technical Intermittent misfire with no fault codes J. Currently vehicle has just under 210k miles, cylinder head work and valve job/timing belt and water pump done at 176k, roughly 2. I am pretty much just getting P0300 codes now, no cylinder specific misfire codes. I checked spark first had the dealer check fuel and I knew compression was gd because it ranned great 85% of the time and when I changed the iac valve I thought I found a vac leak but if not for that relay clicking I probably would still be chasing after it because the misfire had no rhyme or reason to it. Also, very rarely, when idling and at cruising speed the engine will have a little hiccup that again feels like a misfire. Joined Nov 14, 2018 Messages 3 Points 1. I am hoping that maybe one of you has had a similar issue and can lead me in the right direction. Mar 8, 2024 · F150 No code intermittent misfire issues Help us help you. Neither resolved the intermittent misfire and P0301 code. Sep 16, 2024 · I have an issue of misfiring with no code. Jul 12, 2010 · My 02 5. Still have a light shudder sometimes between 20-30mph while light acceleration on slight inclines or pulling the boat. Installed new fuel filter. Tried swapping coil packs for funsies. also misfire is intermittent. Cams and rockers have no signs of damage. From the noise it's making, it deffo only runs on 5 cylinders and after about 15 - 20 seconds it clears up. I have a 2015 Soul+, 2. There are no codes so I'm a bit lost. 5/29 - Visited Dealer #2 for regular service and another look, still no code found from the original incident. The warranty expired a year ago and the car has now done 41000 miles, it was Jan 20, 2020 · Misfire no codes Jump to Latest 3. AFE PG7 drop in filter, stock air box, afe intake tube with 2 vanes installed, HTT 2. This is where the OBD II M Nov 28, 2023 · 1997-2006 Expedition & Navigator - misfire but no code - i have a2003 expedition with a 4. 5 that is not setting a check engine light. TJ General Discussion Nov 21, 2024. Proceed to Test Step 2. If the misfires stay below a threshold level, a code won't get set. It is not enough to trip a CEL or even to trip a pending code. So far I have: Replaced the plugs, black from the rich running. Parked it, and took my other truck. Oct 3, 2017 · IN this case, the misfire would not be intermittent. Passed leak down test. I started by replacing the spark plugs and checked the ohm levels on each of the the coil packs and everything seems fine but the truck is still misfiring. The ECU caps arrive tomorrow, but I’m gonna set that task aside while I get the TB back where it belongs. 0 liter, auto transmission, 90k miles. Makes me think TC, but I don't know how to troubleshoot that. Wrong plugs, cheap or bad wires, timing too advanced already can all cause a misfire. Sep 3, 2022 · Possible Causes of the Engine Misfire with No Code. 4L V8 (with 126,000 miles) and been fighting an on going issue. 4 MultiAir Turbo 135. RB The Mechanic assumes no Mar 21, 2011 · I would look at O2 sensors. 1 2 3. I was surprised, I thought there was carbon on one of the plugs, so I tried to get the truck to a high rpm to burn off the carbon, the service engine light starting flashing, the truck went into safe mode, came to an idle and light shut off, changed plugs and wires all good now. Be certain the battery is fully charged. Pushed the Jul 25, 2011 · So I thought I had fixed all my 6. well with the weather being around 0 degrees i took it to my local ford dealership (ripoff) . Aug 26, 2014 · About 5 minutes into my morning commute, my TB started to idle funny. 6 small V-8 with coil on plug ignition. I've been conditioned to think running issues with no code = bad cps, so I swapped in a new one. I’ll add sea foam ever 2nd or 3rd tankful. 15000 miles on them). I changed #4 and the rest of the plugs last Aug 10, 2012 · You say the misfire is at cruise, meaning light throttle. Nothing. Replaced valve cover gasket. 5l and no codes. Still getting a cylinder 3 misfire. Result: There are no active codes. I have no codes and there is no light flashing. On the second trip, cylinder 6 reported the most. No difference. No check engine light comes on, and never are any codes thrown. 98 TJ 4. I changed the MAP sensor, changed valve cover gasket (it was leaking), clean the intake valves, change the sparkplugs and coils and still misfiring. When diagnosing an engine misfire, the trouble codes may not pinpoint a specific part but should identify the misfiring cylinder(s) and other malfunctioning systems. It's been happening for a while and my initial thought was that it was simply a dying coil pack and it would eventually throw a code. 6K views 8 replies 4 participants last post by DILLIGAF Sep 17, 2022 2004 - 2008 F150 - Intermittent shaking like misfire but no codes - The truck seems to run and drive fine but there are times when I feel a high frequency shaking. It never did. 5 misfires per mile of mixed city/highway - bank 2 is usually has about 2x the number of misfires as bank 1. These codes can help guide your investigation and lead you to the root cause of the problem. Mar 12, 2016 · In cases where there's a cylinder misfire code but no other codes, the ignition or fuel delivery system may be borderline and not yet bad enough to set a code of its own. Plus, if they reflash, they are gonna be disappointed to find I have killed 15 codes already associated with the aircut valves/airpump failure. Feb 10, 2013 · After driving the car to NJ for my Dad's funeral, the misfire became a bit more consistent, although the car continues to run great at speeds other than idle. Couple months ago I had cambelt done and a full service with BKR7EIX Dec 15, 2024 · During the test drive, PCM recorded a rare misfire under all different conditions. 2. Next stop light, checked the Scangauge No codes :confused: CEL would only flash when traveling above 40mph Aug 7, 2019 · For a misfire there has to be certain number of misfires occur before that code is set. 2K views 11 replies 5 participants last post by PooperScooper Jul 7, 2022 Oct 4, 2018 · It happened a few times, and was pretty subtle and didn't last long. Installed new ECM. Jul 5, 2021 · Intermittent misfire with no codes Jump to Latest 9. Dec 27, 2017 · 2004 - 2008 F150 - Intermittent shaking like misfire but no codes - The truck seems to run and drive fine but there are times when I feel a high frequency shaking. There are several possible causes of engine misfires. Accelerating from the stop light was responsive, but shaky until about 30mph, CEL began to flash around 40mph. Here's the cylinder order: SEATS 1 3 5 2 4 6 FRONT OF VEHICLE 2,4,6 being toward the front make them the easy ones to swap. I have a code ready and when I scan the vehicles computer there are zero codes showing up. No new codes yet, but it is still misfiring really noticeable at low RPM (<2500) under power. It seems completely random and intermittent. Some codes require 2 drive cycles to set, others are instantaneous. com May 7, 2021 · In this article, we will take a closer look at misfire detection systems, why some misfires do not produce trouble codes, and discuss a new way of determining which cylinder(s) is/are misfiring if no misfire codes are present. Data log and scan tools all showed negative fuel trims, correct fuel pressure, no codes, but random misfire while in this condition and trying to accelerate out of it. May 4, 2017 · Codes are set only when something is failing and causing the exhaust emissions to exceed the designed limits. Mar 12, 2018 · 2004 - 2008 F150 - Intermittent shaking like misfire but no codes - The truck seems to run and drive fine but there are times when I feel a high frequency shaking. New gasket on the intake manifold. Dec 20, 2024 · Some misfire complaints are a flashing check engine light, and a P0300 to P0312 diagnostic trouble code (DTC) indicates that one or more cylinders are misfiring. have 2000 f150 with the 5. When diagnosing intermittent misfires, don’t forget to look at pending codes for indications of an individual cylinder misfire. Good considerations include thinking about the state of your car when the misfire happened (or if it occurs intermittently). Aug 29, 2019 · $100 PayPaled to anyone that can figure this out, intermittent misfires under wot after ~30 minutes of driving or 4-5 consecutive wot pulls, whichever comes first. Oct 26, 2011 · plugs yesterday my engine 4. Mar 7, 2003 · Customer: Jeep liberty 2003 3. Intermittent engine misfiring with no code? I have a 2016 Toyota Corolla with a little over 65k miles on it and recently it’s started to have an off and on misfire occur at times when I was driving around 25-35mph and it especially does it I try to driver highway speeds 60-70mph. I get no trouble codes at all. I monitored misfire occurrences on scanner while driving and all cylinders on bank 1 (cyl 1,3,5,7) would misfire when the condition happened. Dec 25, 2011 · 1997 - 2006 Expedition & Navigator - Misfire, no codes - Hi since today morning i have a misfire. Apr 18, 2013 · WRX intermittent misfire - no codes! Jump to Latest 41 - 47 of 47 Posts. Dec 21, 2012 · 2001 Chevy S10 with hesitation and stumbling, occasional misfire but owner brought in after clearing check engine light and erasing codes and freeze-frame. It is not related to vehicle speed or engine speed. If it happens again, move to #2 cylinder and so on until problem never comes back. A shorted or open fuel injector solenoid, or a shorted or open coil will usually set a code, but a dirty or weak fuel injector or a weak coil probably won't set a code. It didn't. No other symptoms other than a stutter/misfire and associated RPM wiggle occasionally under load. My 2000 Expedition 5. Random Apr 30, 2015 · No Knock or pinging was heard or detected. Exhaust isn't particularly weird. Jun 6, 2022 · I can feel it misfire when driving under load, typically a hill and low RPM. 0FF intermittent misfire, no codes. I believe it's a coil pack breaking down under load. A misfire will/should set a code. Check sensor shield connector. Jul 24, 2019 · Ignition Intermittent Analyzer (Rotunda 007-00075). I never got bad O2 codes. I get misfires under wot only with no codes. I grabbed an OBD2 scanner (golink for my iphone) and I got a P0301 code indicating cylinder 1 was misfiring. The contamination could prevent your OBDII scanner from retrieving trouble codes stored in your computer system. Wires / connectors all seem solid. I have a 2007 Ford F150 SuperCrew with 5. Some possible reasons for a misfire without a diagnostic trouble code include: Intermittent misfires that don’t occur consistently enough to trigger a code; A misfire that is occurring at a rate below the threshold required to set a code; An issue with the vehicle’s OBD system itself, such as a faulty PCM or a software glitch Dec 14, 2018 · And when there are no codes and the issue is intermittent, the difficulty factor grows exponentially. Is vehicle prepared for equipment set-up? Yes GO to Z51. I get misfire rate of about 12% on forscan mode 6 test, but no cylinder May 31, 2024 · Scratching my head on this one with no misfire registers or codes. Each code has different code setting criteria. Use the electronic service tool to check for active or logged codes. Well now here I am $180 later and still having the misfire. With this type of intermittent misfire, start by methodically checking a few key parts – fuel injectors to make sure they’re clean and working properly, the ignition coil pack for any damage since this part creates the spark for combustion, and inspecting each C. It can fail and cause misfires and stalling and never set a code. Went to Napa to use code reader, no code. they decided it was the spark plugs (which only had approx. 5 turbo, AFE e-mani, ATS Arc Flo, 50HP DDP , 501K, HPTuners, G56, 25. Fuel Supply A. 6L with 315K miles it has a misfire, i can feel. 4 litre has been driving me crazy for about 2 months. I'm attaching two links. 5 years ago with all associated gaskets etc. I don't know why it won't because it is pretty much constant. On Mode 6 on my diagnostic software you could watch the misfire count steadily increase on #7 and every now and then there would be a single misfire on #5 and 6. 7 hemi that I just put a new engine in. Codes : Result: There are active codes. How can i check the coils? Customer: 2011 chevy Silverado has misfire. All accessories should be off during diagnosis. VAGCOM isn't showing any fault codes either. Via scan tool, when it stutters there's a definitive dip in RPM (15-30) that causes a slight vibration and the noise. Aug 7, 2022 · When dealing with a misfiring engine that offers no codes, asking the right questions is the best first step because it will help you successfully identify the problem. These are both vulnerable conditions for a misfire. Mine would run like crap without codes, or would very intermittently set a misfire code. I am having an intermittent misfire/hesitation issue with my 4. Edit: 2009 - 189k. May 5, 2016 · The tuner see's the misfires on his computer as he is driving the car and on the dyno, and every once and a while it throws an engine code, p0300 and p0307 11. Jan 24, 2024 · When the engine light flashes but no code shows up, that’s a sign of an intermittent engine misfire issue that comes and goes. Since the original post I have flushed the engine oil using Wynn's Engine flush - hoping it might clean the valve stems in case one is sticking. Checked for vacuum Apr 7, 2023 · Code was a P0300 multiple cylinder misfire, but did not specify which cylinder. Aug 25, 2020 · Primarily it stutters/hesitates when accelerating and it feels identical to a misfire where the truck hangs up and then surges as you try and accelerate. 3L, 223k miles, no codes. Did a pressure test, checked the grounds, changed the coil, changed the injector, pretty much everything they or the Nissan tech they had on the line could think of. Aug 3, 2014 · Again if anyone has had these issues please let me know what your problem was if it was fixed//// RECAP: Had misfire code on 5, moved coil to cylinder 2 and misfire followed, Replaced all the coils. I did a full tune up to no avail. Jan 15, 2024 · Had no fault codes either at the start and turned out to be that. 6 L started misfiring and hasn't thrown any codes for it. Z51 INTERMITTENT IGNITION PROCEDURE Key off. It’ll do it about once every 30mins or so worth of driving without rime or reason. 0 sohc engine was missing, there was no light on. No new codes or lights. I thought maybe bad gas or something of the sort. Thread starter zzzzzap; Start date Aug 23, 2011; No codes here as well on either vehicle . I knew it was a coil but had no way if finding which one. 7 no codes and most of time get misfire at some cyoinder of bank 2 most of time cylinder 6 , i remove head because it had water in the cylinder ( no outside likencommon water deposit problem ) but customer complain that it have same misfire problem since other mechanic change timing kit but sometimes work perfect , i already switch everything from bank1 to bank2 Jan 14, 2022 · Hi all My s3 misfires on start-up, (unsure if the cold weather has anything to do with it). last couple of times it has been a coil But I have always got a check engine light. i thought ok could be? maybe? almost $500 later and on the way home it started again. You could buy one cheap after market coil pack and try it in turn on each one. Bike has ran fine up until recently 50k and I haven't changed anything. All accessories should be off during testing. ntippet · Registered. I'm getting misfires on cylinder 2 and 4 after the engine warms up. Dec 6, 2006 · My truck is a 2000 F-150 4x4 auto trans, 4. Any no improvement. It has an intermittent miss/misfire/stutter Nov 18, 2012 · The intermittent rough idle/almost stall I had like that threw a code, misfire. Apr 6, 2021 · Hi, new to the forum but I'm hoping someone here has had the same issue. 542 1/4 121. 065 mpg, exhaust & turbo blankets BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Misfire with no code? Please help Please help Jun 12, 2019 · This entire time, there has been NO CHECK ENGINE CODES. No REPEAT Z50. 4 had an intermittent misfire. Apr 23, 2017 · The rough idle persisted with the engine revved between 500RPM and 2500RPM with no load. However, if that was to cause a misfire, it should set a code for a specific cylinder. I finally got to do some work on it today. Jun 11, 2024 · 98 TJ 4. If you scan tool can check for pending codes, ill bet that there is/are pending codes. My guess is the problem corrects itself and the code resets. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc. Then bad went to worse went to really weird. I've been trying to chase down this intermittent misfire for a long time now, so I'll give everyone the background on this vehicle. Seems to happen more under light throttle. After I swapped the coil, the misfire wasn't as pronounced. :mad: It happens when in P or D, but not usually in N. Swap the #6 coil pack with some other coil pack and see if the misfire follows the coil. Jun 17, 2005 · I am having a hard time diagnosing a intermittent stumble/miss/missfire that give an ever-so-brief drop in the RPM's, but throws no codes. There have been 3 or 4 times where I'm driving and has started to misfire for a few minutes, then clears up. Dec 6, 2016 · 2004 - 2008 Ford F150 - Truck Misfires with No Codes - Hello all. One pending code P0303 for cylinder 3 misfire but I believe it is a symptom not the cause in this case for the surging. Jun 23, 2024 · Symptoms: There's an intermittent misfire/stutter noise from the exhaust. I bought a MK7 Gti (yay) and it randomly misfires at idle on start up and randomly when stopping at lights. Oct 17, 2011 · The misfire monitor maintains a history count of detected misfires per cylinder. almxou pkjoj lptdwc mqjfq zycufuw einpix swjex sjwnze nhnvov rywbj wwqgm jmui kisxc bjrip zulvxwdw