Questions tagged [misfire]

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

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1993 Cavalier 2.2 misfiring

My 1993 Cavalier 2.2 is misfiring on the #3 cylinder. A check of the spark plug showed a dry plug but still had spark. Ceramic was cracked so I replaced all four. Thinking the injector was bad, I ...
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Car runs great until shut off then runs bad until shut off again

2008 dodge Avenger 3.5L 140,000 miles. Car runs great for however long I’ll run it for, until I shut it off for 5 to 15 minutes after it’s up to temp, then if I start it, it runs like shit, Has a ...
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Misfiring after changing spark plugs

2016 WRX Stage 1+BIGSF intake Dealing with a very annoying issue I CANNOT seem to figure out. Recently I've been tuning my car and figured changing the spark plugs would be a good idea. Ever since I ...
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Can a timing chain issue cause cylinder misfires on one bank, specifically the odd cylinders?

Make: Chevrolet Model: Camaro Year: 2010 3.6L v6 LT1 I am experiencing misfires on cylinders three and five. I have replaced spark plugs, swapped cylinder 2,4,6 ignition coils with cylinders 1,3,5 ...
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more consistent spark by holding plug boot away from terminal

I've been trying to diagnose some misfire issues. I've noticed that just about each cylinder doesn't have consistent spark when hooking a timing light up to the plug wire. I figured I'd troubleshoot ...
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Volvo engine parts

What is the name of these four elements called? If water gets to them, can that cause a misfire?
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Car runs "fine" only without camshaft position sensor

I bought a used Chevrolet Spark (aka matiz) with a 3 cylinder engine (F8CV engine) a month ago and I noticed some issues: difficulty starting the engine intermittent stalling when in neutral very ...
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Engine misfire only when car is hot

I have honda civic 2011, now it works fine when cold startup and dont give much issues other then when I "accelerate a lot" and having done that for a while, the car starts misfiring. Now ...
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1995 accord ex - hesitation during acceleration

I have a 1995 Honda accord Ex with the VTEC engine. when I press the gas pedal for a fast acceleration, at around 3000 to 5000 rpms the rpms will drop or begin to fluctuate around and then stabilize. ...
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Engine cylinder 5 misfire

On my Mitsubishi shogun sport van 2002 3.0L V6, There was a slight misfire on cylinder 5. We replaced spark plugs, all the HT leads (Ignition wires) and Ignition coils (all 3). That didn't solve our ...
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3 answers
92 views

Subaru Forester - petrol coming out unlit in bursts out exhaust. Ideas on what could cause it?

I've got a Subaru Forester '02 2.5L that I push kind of hard off road on New Zealand beaches. I had a near dead battery recently so bought a new one but on replacing it I must have wiped the ECU ...
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2014 Ford Mustang 3.7L V6 Bank 2 Lean on startup until engine warms up

I've been having an issue lately that has not always been the case. For reference, my car has an aftermarket air intake (AirRaid) and BBK Long-Tube headers w/ O2 sensor extensions, a catted X-pipe, ...
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Can a stretched timing chain cause an issue in only one cylinder

I have a 2003 BMW 318i and had issue saying misfire on cylinder 4 only. Replaced spark plugs, coil packs, injectors tested and also compression tests done on cyclinders 1 and 4 and all came back fine. ...
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Can swapping ignition coils fix a cylinder four misfire?

My car was having power issues so I took it to the mechanic who said cylinder 4 was misfiring. He came back to me and said he swapped the ignition coils over and rescanned with no misfires and told me ...
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I have at least 3 misfiring cylinders on my 2012 Corolla

I have a code reader and it told me cylinders 1, 2, and 3 are misfiring. I also have and older battery and have been told it needs replaced because its low voltage. I have also been told I need a ...
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2 answers
401 views

Will a cylinder misfire immediately fire the check engine light?

A family member is claiming their 4cyl engine on a 2000 Chevy S10 Extreme LS is misfiring. However we're not seeing a check engine light. Wouldn't that automatically trip the check engine light for ...
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Is my exhaust causing misfire or did misfire burn the exhaust?

I hope to not be too vague as I don't know a lot about cars. I recently purchased a 1.2L Fiat Punto II 2005. It has trouble with a rough idle, a power drop off around 4krpm when accelerating and a ...
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Elusive cause to a lumpy idle

Having been around cars for a long time, this has me stumped. 2005 Renault Megane Estate with 1.4 K4J engine. Approx 125 000 km. Engine is restless at idle. Revs are unstable and feels like misfiring. ...
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Misfire at idle

I have a 97 Montero sport with 2.5k miles on the engine(it’s remanufactured). I’ve been chasing a p0305 for 2 years but can’t find the problem. I know I have a possible vacuum leak since the fuel ...
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138 views

Ford Ranger low RPM misfire?

2000 Ford Ranger 3.0L 2WD. I'm having a tough time figuring out if it's trans shudder or a misfire but leaning towards misfire at this point. The rumbling really starts to happen during converter ...
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2012 nissan sentra

HelpI was driving down the highway and out of nowhere my car starting shaking real bad and acted as if it was struggling to move when i hit 60 and then struggled the whole time after that to get it ...
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1 answer
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What is typically involved to repair a internal combustion engine that has a cylinder misfiring?

I have a vehicle with a cylinder misfiring (according to my OBD-II code reader). I have decided to have a mechanic repair it, as I have never performed a similar motor vehicle repair. Note that the ...
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3 votes
3 answers
86 views

What does radiator water in the cylinder well indicate?

The vehicle was running fine last week. Stood for a few days and then when put under load (flooring it) the 2nd cylinder was found to be misfiring. Popped off the engine cover and removed the 2nd ...
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1996 Toyota Tacoma Random Misfire

I have a 96 2.4l tacoma that has right under 200,000 miles on it. Most of the time it runs great but randomly it starts misfiring. Only when it's up to operating temp but besides that there's no rhyme ...
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1 answer
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Can a bad timing chain result in only a single cylinder misfiring?

The question title should be pretty self explanatory. I have a 2002 Nissan Maxima which began idling and accelerating really poorly (seemingly out of nowhere) a few days ago while I was driving home ...
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Yamaha FZS 600 Faser - Losing a cylinder when hot

I recently bought a 1999 Yamaha FZS 600 Fazer. It was absolutely fine on the test ride. Did a couple of other short rides (about 20 mins), also fine. Then today after about 15 mins I lose a cylinder. ...
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2 votes
1 answer
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2006 Buick LaCrosse misfire - Replaced coil pack, new plugs, new wires, 2x junkyard ICM. Still no luck

I have a 2006 Buick LaCrosse 3.8L that is misfiring. There is a strong smell of gas when running. I have had this issue before and it was solved by replacing the ignition control module. I also ...
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1 answer
2k views

Is it possible to clear "permanent codes" on a Volkswagen Jetta?

I was inspecting a 2011 Volkswagen Jetta today and saw on my OBD reader that it had two misfire codes, if I remember correctly P0302 cylinder 2 misfire and P0300 multiple cylinder misfire. The check ...
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Testing whether engine stutter/hesitation is caused by catalytic converter

I have a 2005 Ford Expedition, from my dad, which stutters and hesitates to accelerate. Sometimes it barely has a problem and sometimes it's bad. It has new spark plugs and spark plug coils which the ...
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2 votes
1 answer
1k views

Pros and cons of driving a vehicle with a misfiring cylinder

Check engine light came on for a Toyota Prius that is only being driven about once a month since COVID-19 pandemic began. OBD-II scanner shows P0302, which indicates the problem is a misfiring ...
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Feelin' a misfire but ain't showng no misfire in the computer

I swears when I turn on my van just sitting there I feel a misfire more often than any good person should. In my opinion, I shouldn't be feeling any weird shakin or nothin. When she's been driven a ...
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Location of ims sensor or ifs sensor 2002 Hyundai santa fe

I have a 2002 Hyundai santa fe with the 2.7L V6 does this engine have a ifs sensor or ims sensor and if so where is it located on the engine. The problem I am having is this, the engine will start ...
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1 answer
412 views

Misfiring after not using car for one month

I have a Ford Focus 1.6 LX 16v 2004 MK1. I went away for one month and after I returned the battery was dead. I charged the battery, started the engine and took it for a short drive. I noticed it was ...
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1 answer
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Code P2177, engine noise and power loss?

I have a 07 Mazda 3 and it seems like ita getting worst by the day. I have a check engine light on with the code P2177 System too lean, I'm pretty sure its losing its power when accelerating. I'll be ...
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2003 Toyota Corolla - Cyl Misfire + Lean Mix after month long storage. Possible causes?

I've not been driving my 2003 Toyota Corolla since we were ordered to shelter. Today, I turned it over and found it rough idling. ECU faults show as follow: which reads: Current Fault: P0303 - ...
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5 votes
4 answers
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Spark Plug porcelain fell into cylinder

I own a 2016 Ford Mustang Ecoboost. About a month ago, I had a misfire in cylinder 3. I Decided to just swap out all spark plugs, and only plug that gave me a problem to get out was of course #3. ...
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1 vote
1 answer
76 views

Cylinder misfires since having a full service on Golf MK5 2005

I took my VW Golf MK5 2005 (130,000 miles) to have a full service the other week which included changing all 4 spark plugs. Whilst driving home the engine management light came on and I lost some ...
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06 Chevy Cobalt: Low Power, Rough Idle (Misfires), now Water in Oil

Been driving it for two months now in cold Chicago weather. -Car first was only experiencing weak acceleration and some minor engine "pulsating" at idle. -On further probing during drive cycles with ...
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Sludge in the oil of a Subaru Forester

My Subaru Forester has 105k. For the past three years, I've had to add oil to it at an increasing rate. In the past few months, I've had to add a quart every week or two. I have recently found out ...
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2 votes
0 answers
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Engine jerks at certain RPM - Misfire & fuel system over pressure [P000F, P0302]

My Audi A5 1.8t has started having some hiccups after an engine job (Changed valves, timing chain & camshaft intake side) The car starts fine, it sounds fine, but it has the following problems: ...
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0 answers
171 views

My hyundai Accent 2012 is having issues when accelerating

My hyundai Accent 2012 is having issues when accelerating. It works great on low speed, but past 30kmh, if I accelerate more than regular cruising, the RPM will drop heavily and I can feel an heavy ...
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1 vote
0 answers
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Can I learn anything about a misfiring cylinder from the fact that the dialectric grease around the plug is discolored?

On the way to the in-laws yesterday my 2008 fusion started bucking. Code reader says I'm misfiring on cylinder 2. I popped off the coil boots thinking I'd swap them and see if the problem cylinder ...
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4 votes
2 answers
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Can lack of oil cause P0300 Random Misfire?

I get OBD code P0300 Random Misfire (and no other error codes) on a very poorly maintained car. I changed the valve cover (whose spark plug well gaskets were degraded) and spark plugs, but the engine ...
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I have a 2012 Chevrolet Camaro 2lt with a lot of problems

I have a 2012 Chevrolet Camaro RS and I'm getting a cylinder 6 misfire. I swapped the spark plugs because they were burnt, but I'm still getting a cylinder 6 misfire. I even checked the coil packs. ...
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1 vote
2 answers
1k 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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1 vote
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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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2 votes
0 answers
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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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117 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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1 vote
1 answer
97 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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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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