Questions tagged [misfire]

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

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Audi 1.4 TFSI EA211 Misfire cylinder 4

A short while ago I had an Audi Q3 1.4 TFSI EA211 in for a misfire and thought it would be an easy fix Friday afternoon failed Coil-On-Plug. Coils all OK, sparking well on all, plugs all fine, ...
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Diagnose misfires before the ECU codes them

My 2007 Mazda 6 ran rough for months before the check engine light finally came on and the ECU set a code for misfires on cylinder 1. Replacing the coil on that cylinder fixed it and it was running ...
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176 views

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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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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64 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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59 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 ...
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1answer
56 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. ...
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45 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 ...
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52 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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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 ...
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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 ...
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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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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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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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40 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. ...
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125 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 ...
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628 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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87 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 ...
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1answer
517 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
133 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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41 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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43 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,...
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118 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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1answer
48 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 ...
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171 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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3k 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. ...
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1answer
63 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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51 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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68 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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222 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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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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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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4k 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 ...
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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. ...
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882 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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252 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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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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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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64 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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65 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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220 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
71 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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8k 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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71 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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137 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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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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160 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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514 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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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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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 ...