Questions tagged [misfire]

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

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votes
3answers
3k 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 ...
0
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2answers
51 views

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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1answer
600 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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1answer
52 views

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 ...
0
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1answer
88 views

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. ...
1
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1answer
36 views

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. ...
2
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2answers
62 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 ...
2
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1answer
93 views

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 ...
0
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1answer
42 views

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 ...
0
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1answer
37 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 ...
3
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1answer
6k views

Misfire in cyl 7 on 2007 Suburban 1500 4x4 with 5.3 L flex fuel LTZ

2007 Suburban 1500 4x4 with 5.3 L flex fuel LTZ 267,000+ miles. Having trouble with running rough and misfire. The ODB II indicates P0307. Checked wires - replaced though nothing is wrong, no ...
3
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3answers
76 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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2answers
189 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 ...
0
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1answer
93 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 ...
1
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1answer
64 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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0answers
13 views

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 ...
1
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1answer
59 views

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 ...
3
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2answers
2k views

2002 Jeep Liberty 3.7 MISFIRE multiple cylinders

2002 Jeep Liberty with approximately 130,000 miles. Engine is misfiring on multiple cylinders. Burnt wire smell and smoke coming from firewall area. After troubleshooting, I believe the engine is ...
3
votes
1answer
4k 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
23 views

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 ...
5
votes
1answer
1k views

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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0answers
34 views

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. ...
2
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4answers
9k views

Check engine lights came up after Air filter change?

Yesterday I changed air filters in my car (Nissan supper saloon N16 - model year 2000). After installation the check engine light came on when I started the engine and the engine seemed to be running ...
0
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1answer
132 views

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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1answer
60 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 ...
0
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1answer
345 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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0answers
49 views

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 ...
2
votes
1answer
381 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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1answer
127 views

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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0answers
35 views

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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0answers
34 views

Random misfires, cylinders 2 4 6 misfire

have the exact same problem, except I have a 2002 Hyundai santa fe with the 2.7 v6, but i cannot find the ignition failure sensor anywhere on the engine. I have changed the following parts, cam sensor,...
4
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1answer
4k views

Hyundai Santa Fe 2004 3.5L Random Misfire hesitates when accelerating

I have a 2004 Hyundai Santa Fe 3.5L V6. When I was driving a couple of days ago the check engine light flashed and after a while it stayed on. The codes are P0300 which is a random misfire as well ...
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1answer
4k 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
85 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 ...
1
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1answer
40 views

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 ...
2
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0answers
183 views

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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2answers
692 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, ...
6
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3answers
2k views

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. ...
1
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1answer
61 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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0answers
13 views

Jeep Liberty won’t stay on

It first started misfiring so I changed the oxygen sensor. After that it all went bad. The Jeep would not crank up to start. After a few fires it started, but when I released the gas the rpms would ...
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0answers
47 views

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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0answers
63 views

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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0answers
64 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 ...
3
votes
0answers
931 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 ...
6
votes
2answers
6k views

Random misfires and 2+3 cylinder misfires on 2009 Accord

I have a 2009 Honda Accord 2.4 L. It is reporting random misfires and cylinders 2+3 misfires. There was a thread posted about this same exact problem but was never resolved. Any help would be ...
4
votes
2answers
3k 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
30 views

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 ...
5
votes
1answer
10k views

Ignition coil overheating: what to blame?

I have got in the past ignition coil overheating, making the engine run very erratically and in some cases it even wouldn't run at all until the coil got cooler. In one occasion I changed the coil for ...
3
votes
1answer
3k views

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 ...
3
votes
2answers
24k views

Sputtering at low rpm and massive loss of power, sudden onset and persistent

Vehicle: 1994 Nissan Sentra GA16DE engine 4-speed automatic transmission 298,400 km Recent Work (3 months ago): spark plugs spark plug cables distributor rotor distributor cap cleaned K&N ...