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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
My radiator fan is shaking and rattling.
Hello, thank you for writing in. The fans can cause the vehicle to shake and vibrate. If you suspect the problem lies with the fans, start there. Check for any broken fins, extra noises, debris, or other obvious signs of...
Question
Check Engine light is on
Hello, thank you for writing in. The work you have put in thus far is only benefiting your car, but misfires can be a lot trickier than most think. You may be having a low fuel pressure issue, dirty MAF...
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
Engine shaking
Hello, thank you for writing in. One question that needs answering is what are the plugs wet with? While it is most commonly oil, coolant and fuel an also foul the spark plugs. If fuel is the issue, you need...
Question
Be c.f.. Shaking and check engine light on. Not flashing. Just had plugs and coils done. Rpms erratic.
You need to scan the computer to get the stored codes and let us know the codes received since there may be many possible codes pertaining to this problem. You may have a problem with a particular coil wires from...
Question
My car misfires when it's cold al so idling rough
Hello, thank you for writing in. The vehicle may be having one of several issues including clogged fuel injectors, poor compression (metal expands when hot), any of your air intake sensors, or a vacuum leak. The valves and lifters can...
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
Hey I have a chrysler300 2009 touring I have a p0301 and wen my car runs for a while it won't crank back up till it cools down
Hello, thank you for writing in. The vehicle's cooling leak may be causing the misfire. The leak needs to be repaired first, and then we can take any other issues from there. The starting problem may also be the vehicle's...
Question
My car has been sitting for 5 months, it starts but when I drive it it sputters and stalls, why is that?
You may need to add fresh fuel and then see if it runs better. If engine misfires then you may have fouled plugs and or bad coils. have computer tested for misfire codes to isolate the cylinder that is misfiring....
Question
Cylinder 4 misfire code P0304
You should recheck computer to see if same code is coming up P0304? If it is then check plug wire to see if it has oil on it from a leaking valve cover gasket getting oil on plug wire and...
Question
I have a 2006 ranger and recently the car started loosing power and it wouldn't drive check engine light came on and it dia
You will need to have a compression test and ignition test on the three cylinders showing misfire. You may have jumped timing or lost compression in those cylinder. A six cylinder engine will not run correctly on three cylinders. Have...
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
Misfire
You should have the computer checked to get the misfire codes to what cylinder is misfiring and check for spark from that coil and if you have spark at the coil then have compression on the engine to see if...
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
once i turn the car it was shaking and once you drive it it was not accelerating like it should i started to see smoke come out
You should check to see if you are losing coolant since the smoke may be from a blown head gasket leaking coolant into one of the cylinders causing it to misfire. If you are not getting low on coolant then...
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
96 Ford F150 with a 5.0 it's got a rebuilt motor and transmission I'm having problems with it firing a radically when it cranks
You should check the computer for codes first and address any codes received first. Have the fuel pressure tested to see if the pressure is within specifications and holds the pressure with key off. If problem continues then you may...

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