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Misfire

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Symptoms of a Bad or Failing Ignition Cable
Common signs include a decrease in power, acceleration, and fuel efficiency, the Check Engine Light coming on, and visible damage to the cables.
Symptoms of a Bad or Failing Ignition Coil
Common signs include the Check Engine Light coming on, engine misfiring, rough idle, a reduction in power, and the car not starting.
How Long Does a Top Dead Center (TDC) Sensor Last?
The top dead center (TDC) sensor is the point from which the firing order is determined and the ignition system measurements are taken. The measurements are normally defined as before...
How Long Does an Oil Cooler Last?
The heat that the engine produces can produce a lot of damage in the right situation. Making sure that all of the systems on a car that reduce the heat of the...
Is it Safe to Drive With a Misfiring Engine?
Repairing a misfiring engine can be simple or complicated, depending on the reason it is misfiring. The most common causes of engine misfires are: worn spark plugs, weak fuel injector, vacuum leak,...
How Can Problems with the Ignition System Cause Misfiring?
Misfires are never good, and they're always a sign that there’s a problem with the engine that needs to be repaired. The problem won’t “go away on its own” and waiting too long...
Why Misfires are Often Misdiagnosed
Properly diagnosing a misfire can be a challenge, as a variety of symptoms can cause it, or a different problem could be present.
The Check Engine Light Demystified
Your car Check Engine Light can mean many things. The Check Engine Light comes on when there's an electrical or mechanical problem with your car.

Related questions

Question
Rough idle and engine misfire
Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...
Question
Cylinder 2 misfire
Engine misfires can be caused by a list of problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark...
Question
cylinder 3 and 4 misfire
Hi there. Check the spark plugs to see if they have burn spots on them. Switch them out with cylinders that are firing. If the other cylinders do not fire now, then the spark plugs need replaced. If the same...
Question
Multiple cylinder misfires
Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules...
Question
Spark plug misfire and car not starting
Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules...
Question
Car is not firing on the first two cylinders
This is generally related to spark problems when it is more consistent. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules not working properly. As you know,...
Question
Noise coming from fuel tank....some time while running get blast noise from silencer....spark plug are new... 2011 Chevrolet
Hello - I think you still have fuel supply issues - perhaps a leaky injector., or a weak fuel pump (you mention it is noisy). Backfiring is a symptom of fuel supply problems. Check for problem codes, whether the Check...
Question
My check engine light came on so I brought it to Autozone. They told my #5 ignition coil was misfiring, can I still drive it?
The vehicle should be able to be driven for a short period of time without causing further damage since problem is intermittent. You should have a mechanic like one from YourMechanic diagnose the code for the misfire. The code P0305...
Question
check engine light is on
A fault code p0304 is typically caused by a faulty plug or a failed ignition coil. If it has been quite a while since there has been a tune up done, I would start there. Many times a misfire can...
Question
Misfire in cylinder #4
You should be fine to drive for a day or two with a misfire on one cylinder, however I would not recommend letting this go un-repaired as this is something will only get worse and may trigger additional problems and...
Question
My truck has a violent shake, rapid onset, massive white smoke, increases shaking with turbo charger pressure increase, and has an error code of p0303.
Hi there. If you are having a misfire on cylinder number 3 and the injectors are new with the fuel lines cleaned out, then the exhaust valve is burned on cylinder number 3 and needs replaced. This is why there...
Question
Random misfires
Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...
Question
In mornings when cold and mostly after a rain car will miss very bad and then clear up
Anytime you are getting a misfire when it is damp and cold the ignition system is going to be the cause most likely. The most common cause will be the ignition spark plug wires arching to ground until the moisture...
Question
Multiople Misfire at almost all cylinders all at once no warning with codes
If you have a multiple misfire, the camshaft tensioners would not be the first place I would look for trouble. I would first check for air leaks and then carefully check the fuel and ignition systems. Camshaft tensioners usually manifest...
Question
Multiple cylinder misfire
Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...
Question
Check engine light on - persistent misfire 2008 Honda fit
Hello - the P0304 indicates, as you state, a persistent misfire on cylinder 4. This could be due to a bad plug or coil on that cylinder, or a clogged or leaky fuel injector, causing the misfire. "Reading" the color...
Question
Rough misfire at idle.
Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules...
Question
Engine erratic behavior, misfiring hard starting every now and then
Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...
Question
Car misfires or Chugs at 4-5 gear
Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules...
Question
Cylinder 3 Misfire - 2005 Mini Cooper S
Hi - yes, for whatever reasons, the stock coil packs use steel contacts instead of brass. I would replace the stock coil with an aftermarket coil that uses brass contacts. Before purchasing, I would recommend a pre-purchase vehicle inspection by...

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