Questions tagged [misfire]

A condition where one or more engine cylinders experiences lack of combustion or mistimed combustion through detonation

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2answers
33 views

Low compression in one cylinder with a misfire code, but no smoke in the exhaust

Chevy V6 4.3 with 281k miles. It recently threw a misfire code isolated to cylinder #3. The misfire seems systematic and not random, though, as it idles rough. I've got an open question on it already, ...
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16 views

Chevy Blazer 4.3 with p0303 error (cylinder 3 misfire) shortly after running medium-hot: now wonky idle, but smooth at high RPMs

I've got a 97 Chevy Blazer with the 4.3 and 281k miles. It might be of-note that a shop replaced my Lower Intake Manifold gasket about 18 months ago. At the very end of a long trip this weekend it ...
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16 views

Misfire data log

I'm trying to understand what is the meaning of "Misfire" in this graphs, it always starts with value 0 and then can move up to 3. Is it a sensor? if yes what exactly it measure? if not, what is it? ...
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8 views

2010 GMC Terrain misfires & leans codes

My 2010 GMC Terrain while maintaining a speed of around 60 - 70 mph starts to hesitate and if I don't release my foot from the pedal I will get flashing check egine. I've noticed it likes to happen ...
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40 views

2009 Honda Accord 4-cyl

I changed the crankshaft. Now my car wont work when I give it the gas, it wants to shut off. Check engine light is on. Had Honda and another mechanic look at it montell me starter I think not I ...
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23 views

What causes P300, P301, P303 and P304 after driving several miles? 1999 Accord 2.3l

I have replaced the spark plugs, which were oily, cleaned the tubes, replaced tube seals (which were cracked), and have not seen oil leaks since, but the misfires persist. The wires are fourteen ...
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30 views

Does a puddle of Seafoam cleaner indicate a vacuum leak?

Engine is "skipping", cutting out or what seems like a misfire (?) every once and a while. (Even more so when the AC is on). To start, did the SeaFoam throttle body cleaner, as shown here: How ...
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24 views

VW Fox misfiring

I have a vw fox 2006 1.2 and have had it for just over 3 months. I have noticed it starts to misfire and the engine loses power sometimes coming to a complete stop after a stall or judder when revs ...
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2answers
46 views

2005 Subaru Legacy Cylinder 3 misfire

My Wife's Subaru's check engine light recently came on, when we went to auto zone to check the code it came back as a cylinder 3 misfire, we went to our mechanic and he changed the sparkplugs, but ...
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1answer
27 views

P3431 P0304 but engine does not feature cylinder deactivation?

2010 Dodge Grand caravan 3.8L (I think) CEL light came on and codes pulled were p0304 p0300 and p3431 , I'm curious as to what's up with the p3431. Looking it up on the typical obd sites say that it'...
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2answers
205 views

Narrowing down cause of misfire when engine is warm

2001 Toyota Tacoma 2WD 2.4L 4cyl. Just under 100k miles. Looking for guidance on narrowing down the culprit for a misfire. Here's the pattern: Truck runs fine from a cold start, and continues to run ...
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26 views

Engine misfiring past 70-80pmh

I’m having a bit of trouble with my car however nobody can seem to diagnose the problem. I got the car three months ago and within the first month driving on the motorway I reached about 80 mph and ...
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18 views

Huyndai sonata 2012 engine misfires

I have Huyndai sonata 2012 GDI 2.4 cc The car starts just fine, but after few miles the engine misfires in the same cylinder, and when i stop the engine and run it again, the engine go back to normal ...
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55 views

Why does my NB Miata struggle to start when shut off for a short time?

Why does my 2000 Miata 1.8L (104000 miles) struggle to start when shut off for a short time? This doesn't seem to happen as frequently when starting up after being off over a weekend or just overnight....
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7 views

2005 F-150 High B2 LTFT

Been chasing this for a while now. LTFT B2 likes to sit around +20% at idle and up to 3000RPM B1 will sit at about 12% at idle and drop to 6 at higher RPMS. It is also beginning to buck a bit when ...
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2answers
1k views

MAZDA 3 2006 (UK) - poor acceleration then takes off at 3250 revs

I have a 2006 Petrol Mazda 3 1.6, with 74k on the clock. I have a problem where the car is really jumpy with poor acceleration when it is accelerating from 0 up to 3250 revs, it feels like it is ...
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1answer
46 views

Weird object in cylinder head preventing spark plug install

My friend has an 04 Acura TL (Engine Model J32A3). The car was loosing power and shuddering and the engine light came on. It appears that each cylinder is misfiring. Below is a screenshot of the code ...
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1answer
75 views

Spark jumping off wires and into any ground near them. Wires are new

I have an old opel astra 2.0 8v. Thing is car idles rough and you can feel it misfiring very often, mostly at idle. In the dark you can see 3 of 4 cylinders have the spark jumping off the wire boot ...
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22 views

2000 Jeep Grand Cherokee 4.0 200k miles - 02 Sensor and cylinder 5 misfire code come on at the same time

People keep telling me it can't be an 02 sensor, and other people keep telling me that an 02 sensor has given them a misfire so I'm not sure what to do. I've replaced the plugs (old ones were in bad ...
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0answers
42 views

Clicking sound in engine, very strange evolution

I have come here in hopes to get some help regarding my impala. It is a 2006 Chevy Impala with a V6 engine, I was out of town for 2 weeks and when I got home I got in my impala and stated her up. it ...
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44 views

1997 s10 4.3 misfire/dead cylinder

I have a 97 s10 4.3 W vin with 273k miles that sat for 3-4 years due to a bad clutch. Recently replaced the clutch and fuel pump got it running and the #5 cylinder was dead no spark replaced all 6 ...
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1answer
217 views

Misfire and loss of power at between 2800 and 4000 RPM

First I need to start off by saying that NO Check Engine codes are thrown by this issue. Car is a 2007 Mazda CX-7 turbo, non-awd. What's happening: This can be broken down into 2 section really, a ...
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166 views

Cyclinder 2 misfire error code - 11 Dodge Journey 3.6L V6

2011 Dodge Journey Mainstreet 2wd 3.6L V6 100k miles Check Engine Light on, first read Low Voltage replaced Battery Check Engine Light came back on, 2nd read Cylinder 2 misfire, & Thermostat ...
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1answer
964 views

What would cause a BMW 3 series E90 to misfire until the engine has warmed up?

I took my car to a mechanic because of misfiring issues. He said his computer told him it was an ignition coil pack issue, specifically coil 1. Anyway, he changed it and the car was still misfiring. ...
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1answer
62 views

After mechanic work, car starts fine but accelerating stalls the engine

I own a 2003 Mitsubishi Lancer, and have been the only owner and mostly the only driver. About a year ago I had a weird misfiring problem where if I pushed the accelerator down more than half way it ...
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1answer
52 views

Engine misfire and poor mileage

My 2015 Chevy Suburban has 180k miles and now it gave me a check engine light code with a misfire. It shakes a little bit and does not give good fuel mileage. Also, the reader on the speedometer use ...
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1answer
70 views

1998 4Runner 2.7 Misfire with DTC P0171, P0300, P0301 , P0304

While driving on the highway, suddenly the CEL started flashing and the truck started msifiring, I got off the highway and retrieved a P0171, P0300, P0301 , P0304. I shut it off and waited for a few ...
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582 views

2013 Subaru WRX P0300

On a Subaru 2013 since 70,000 miles I've had the fun P0300 code activated and my check engine light on, cruise and traction control disabled. I do not have any other misfire codes being shown(unlike ...
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1answer
91 views

My 1997 lancer jerks when accelerates and shakes when idling

i got a big problem, I have a 1997 Mitsubishi lancer, with a 1.6 liters engine, a 4g92 to be exact, and when Its idling it keeps shaking, the exhaust sound like there are little misfires, but no check ...
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55 views

Car Jump Started in wrong way

We switched the jumper cables when trying to jump start my Altezza 4 cylinder. Main fuse and other fuses were blown. I replaced all the damaged fuses and battery. When we eventually got the car to ...
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2answers
227 views

Misfiring and loss of brake power

i have a 2004 VW Golf 4 which misfire and brake loss of power. i have bunch of codes which i don't know how to go forward. the codes are; 18321, 18034, 18020, 18014, 17839, 17924, 16725, 17580, 17952. ...
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177 views

Renault Megane 1.4 will not start

2003 Renault Megane 1.4. Will not start. Code reader gave message that cylinder 4 misfiring, but have replaced it and also pencil coil. Zeroed the code reader. Checked fuse box - no corrosion/grease. ...
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23 views

1996 Jeep Grand Cherokee misses on the highway, not on surface streets

My good old Jeep Grand Cherokee, 1996 and original owner with 274,000 miles is, the last few days on the freeway only, missing and semi stalling. No check engine lights, all fluids etc. are fine. I ...
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95 views

Misfiring problems

I have 98 Sliverodo 5.7 vortex. It ran hot on me and I was told it was my head. Well turns out that it was an intake gasket. So I replaced the head and intake gaskets. Once I put it all back together ...
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2answers
914 views

Motorcycle lost power during hard acceleration, made sneezing/popping noises, now won't start

I was riding my 2017 Husqvarna 701 Supermoto hard for about an hour today when all of a sudden the bike started losing power during hard acceleration. I first noticed it when I tried to power wheelie ...
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1answer
668 views

07 Dodge Caravan with 3.3 cylinders 3 and 6 misfire

I have a 2007 dodge caravan with a 3.3 with a misfire on cylinders 3 and 6 ( no spark coming from coil to plugs on cylinders). I have changed the plugs the wires. The coil twice and the crank sen. I ...
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4k views

Did I completely ruin my engine from driving with no oil?(video)

I have a 2004 elantra, not sure how many miles are on it because the odometer has been broken since I got it four years ago but I'd say it's over 200k. It's a car that needs a lot of upkeep and I've ...
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1answer
560 views

MINI Cooper limp mode without a CEL

Yet more strangeness with my 2008 Cooper S. Limp mode comes on almost immediately after starting the car for the past few days. This displays a half-filled engine icon on the dash and greatly limits ...
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1answer
60 views

1996 Ford explorer XLT 5.0

My explorer has what sounds like implosions or miss fire's in the intake when taking off and wants to stall and will stall when I come to a stop can anyone help. Some times runs rough some times runs ...
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32 views

Persistent miss on cylinder #2

Dodge 2004 Grand Caravan 3.8 motor. Changed plugs, wires, coil pack. #2 cylinder not getting spark. Where should I look next?
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3answers
1k views

2008 Ford Crown Vic Police Interceptor misfire on cylinder 2

I have been trying to track down this problem for the last week and it is driving me crazy. Hopefully some of you could shed some light on this situation. 2008 Ford Crown Vic Police Interceptor with ...
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1answer
3k views

Rough idle and 02 sensor voltage drops to zero, cylinder 2 misfire

Vehicle is a 2007 Dodge Nitro R/T with a 4.0L engine. I've had a lot of trouble diagnosing a cylinder 2 misfire and looking for help on next steps. Symptoms After engine is warm, stop and go ...
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0answers
131 views

Peugeot 207 2009, issues with LPG

My 207, since about a year, is having some troubles 'passing' to LPG. It starts regularly on petrol then, as soon as the ECU switches to LPG, if I'm not pushing on the gas, it shuts down. My work-...
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1answer
164 views

Third misfire code on different cylinders in two months

I have a 2002 Mazda MPV with 133,000 miles. Two months ago, my mechanic replaced the ignition coil on cylinder 4 due to a misfire. Two weeks ago, he replaced the coil on cylinder 6 due to a misfire. ...
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2answers
2k views

Help identifying misfire conditon on 1998 Honda Civic DX

I'm struggling to identify the cause of a misfire condition in my 1998 Honda Civic. It has D16Y7 engine with 185,000 miles on it. The spark plugs, wires, distributor cap, rotor, and ignition coil ...
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0answers
48 views

Changed radiator and hoses on 97 Toyota Tacoma now check engine light on

After getting new radiator and hoses on 97 Toyota Tacoma check engine light came on. Diagnostic said misfiring changed all plugs and old coil wires light came back on, diagnostic says #6 misfiring. ...
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1answer
106 views

Diagnosing silent misfires

2003 Honda Civic EX (~230,000 miles) has been giving me misfire codes for a while, mostly on cylinders 2 & 3, but sometimes 4. P0300 Random cylinder P0302 Cylinder 2 P0303 Cylinder 3 P0304 ...
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4answers
12k views

Trying to Understand Post Cat O2 Behaviour During a Misfire

I've been researching using pre and post cat O2 waveforms to diagnose misfires and ran across this quote from the article, Intermittent Engine Misfire Analysis: Keep in mind that the downstream, ...
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1answer
41 views

1993 CAVALIER 2.2 engine misfire

My Cavalier appears to have a misfire on cylinder 4. A compression test gave readings of 120, 120, 122, and 60 suggesting a loss of compression on that cylinder and the spark plug keeps fouling with ...
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3answers
2k views

Black Spark Plugs that Clean Themselves

Vehicle: 2002 Mazda Protégé LX, 2.0L engine, automatic transmission, 240,000 km Recent Work: Thermostat replacement Symptoms: Owner reported that the car shook and stalled on startup. She parked ...