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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...
Symptoms of a Bad or Failing Timing Belt
Common signs include a ticking noise coming from the engine, an engine that won't turn over, engine misfires, and oil leaking in front of the motor.
Symptoms of Bad or Failing Spark Plugs
Common signs of faulty spark plugs include slow acceleration, loss of power, poor fuel economy, engine misfires, and difficulty starting the car.
Symptoms of a Bad or Failing Fuel Pump
Common signs include a whining noise, hard starting, engine performance issues, and an inability to start the car.
Symptoms of a Bad or Failing Timing Chain
Common signs of a faulty timing chain include engine misfires, metal shavings found in the oil, and rattling sounds from the engine while idling.
Is it Safe to Drive With a Misfiring Cylinder?
An engine misfire can be caused by bad spark plugs or imbalanced air/fuel mixture. Driving with a misfire isn't safe and can damage your engine.
Symptoms of a Bad or Failing Valve Cover Gasket
Common signs of a faulty gasket include a burning oil smell, dirty valve cover, oil leaks, low engine oil, and a rough-running engine that misfires.
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
06 325i started to misfire when driving and the car felt choppy
Without knowing exactly what is the cause of the running issue it cannot be quoted. You will need to have your engine and computer tested first to isolate the cause and then a quote can be given. You should get...
Question
2005 Mitusubishi Galant 194,000 miles motor was rebuilt at 161,000. Check engine light came on
You will need to have the wire harnesses inspected to see if there is loose or corroded connections. Since there was water that got into connections it may have corroded connections and when turning it may move the harness and...
Question
2000 Sentra shaking, hesitating, heat coming through ac vents, smoke from engine when hot.
You need to have computer tested to see if you have misfire codes and may have got oil onto one or more of the spark plugs and coils causing the misfire. The A/C will not work normally since the computer...
Question
04 Buick Le Sabre. Couple days ago the word volt popped up on the dash.
Yes, it could be a problem with the ignition module, but I'm still concerned about your "Volt" warning. Before you replace any expensive electronic parts, you need to do a check of the charging system. If there is a problem...
Question
Ford Crown Victoria misfires and stalls
There are many potential causes for your concern. A misfire results from ignition problems, an incorrect air/fuel ratio or loss of compression. Since you said it only stays running when you give it gas, my guess is that the air/fuel...
Question
My car is having a missfire and not burning the gas wat can it be
This may mean you are running too rich and will need to have the engine O2 sensor and mass air flow checked to see if they are causing the engine to run too rich. i recommend having a mechanic like...
Question
My car had code 420 pop up and cylinder 1,2,3 misfire , my car was jerking when I drove and had loss of power
Misfires are frequently caused by ignition coil failures, but there are other possibilities as well. Sometimes I might diagnose a misfire by swapping components between cylinders to see if the misfire moves. Anyway, you are probably on the right track...
Question
Accelerate
You may be having an engine misfire. If your check engine light is on then have a computer scan to see what codes are stored to find the cylinder that is misfiring and may need spark plugs and ignition coils...
Question
Recently replaced engine due to water damage. Now car shakes at idle and check engine light flashes.
If your catalyst is bad then I would suggest replacing it first and then clear codes and see how engine runs afterwards and if it needs further diagnosis.
Question
Check engine light flashing on 2000 ford taurus
If the Check Engine Light is flashing, it means that continuing to drive your car could cause damage to the catalyst. You probably have a misfire and it is likely something that happened while you were changing your spark plugs....
Question
While Accelerating My Car Slows Down & Jerks Then Comtinues To Reg Speed I Did That Twice In Less Than 3 Mins
If the check engine light came on or blinks when loss of power then have codes checked to see if computer stored misfire or other codes nad may have a problem with one of the coils or spark plugs. ...
Question
I have a 2001 dodge ram 1500 5.9 V8 2 wheel drive. occasionally my truck will lurch or skip a beat. my rpm will go up and down. an
There are no technical bulletins pertaining to this problem. The problem may be due to the ignition system misfiring from an ignition wire or coil short or spark plugs worn. You should have the computer scanned to see if one...
Question
Car shakes when accelerating
At 200 thousand miles it could be just about anything. You would have to hit a speed bump pretty hard to produce a result like that, but if your problem is related to the speed bump, it could be that...
Question
is it normal for an automatic 4 cylinder car to jerk or shudder going uphill?
This is not normal and you most likely have an engine misfire from a bad plug or ignition coil. Have the engine computer scanned to see what cylinder is misfiring and then you can isolate what cylinder is having the...
Question
Rough Idle
Since the check engine light came on you will want to have a computer scan for stored codes. This may indicate the cylinder that is misfiring or having issues and then further diagnosis on that cylinder can be done to...
Question
Engine Light is blinking, car shakes, and gas cap light is on
For the case of the gas cap leak you will need to have a smoke test and cap test done to see where the evaporative system is leaking. In order to do this will require the system put in test...
Question
Misfires
The return of a misfire after replacing ignition components may be an indication of fuel injectors clogged or the engine cylinder compression is too low or valve sticking. Have the fuel injectors cleaned and see if after cleaning and clearing...
Question
When i start my car, my car will begin to shake, which goes away after a minute or by me turning the car off and starting again
The problem sounds like the engine may be misfiring in the ignition system or the computer has a problem with one of its sensors like the camshaft or crankshaft sensors. The best way to narrow down the cause of the...
Question
Car shaking during start up while it is cold outside
You will need to make sure you are using the correct oil viscosity for the temperature outside. If you use the incorrect oil it may cause the VVT system to not work correctly and cause erratic running if one or...
Question
Hello I have multiple cylinder misfire codes and I've replace the spark plugs, wires, distributor cap and rotor, and there is also
You should have the fuel checked to see if there is water in the fuel. This will cause misfires. If fuel is not the issue and you already replaced ignition components then suspect clogged injectors. For the transmission slip this...

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