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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
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
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
Q: 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
Inspector for faulty vacuum hose
A code of P0300 can be caused by vacuum leak in the PCV system or in the intake manifold gasket. It can also be caused by excessive water or alcohol in the fuel. Try adding dry gas or Heat to...
Question
missing out between 20-45 mph
If the plugs and coils are in good shape, that leaves fuel system or vacuum leaks. It is probably too early in your car's life to expect internal malfunctions. Look under the hood for any hoses or rubber boots that...
Question
My trucks cel is flashing and throwing p0300 Multiple cylinder misfire and I changed the spark plugs and the coil packs and cran
You were probably right to change the plugs and coils, they needed to be ruled out. But since you're not getting codes for a specific cylinder, your problem is probably a little more subtle. You might be having a problem...
Question
I just recently took my car in to the shop and they said my radiator had a leak in it and my valve cover was broken so they fixed
If you are having a misfire after the valve cover was replaced you may have got some oil into one or more spark plug holes from the valve cover leaking and is causing one of the ignition coils to misfire....
Question
My car started knocking in the engine and bucking when I started it today, what could that be?
You may have a misfiring coil or spark plug or a problem with the camshaft variable timing. Make sure you have a fresh oil change with correct oil viscosity and have computer scanned for codes to see what cylinders were...
Question
Misfire and low oil pressure
The oil light comes on when the oil pressure drops below a certain level: usually about 8 psi. Since the oil pressure will depend to some degree on how fast the oil pump is turning, you are probably seeing it...
Question
I have a 2009 PT cruiser with a p302 code coming on only at idle speed. It also has poor/slow acceleration, especially up a hill
The misfire is most likely from a vacuum leak either in the PCV hose or valve or the intake manifold itself has a leak in the housing. Replace the PCV valve and check PCV hose and then if problem continues...
Question
Car jerks when idling and the most when I’m at a stop with heat on full blast.
If you are getting a rough idle with misfire only at idle or coming to a stop and runs fine when driving above idle is usually caused by a vacuum leak in the intake or vacuum hoses. You will need...
Question
My 2000 Chevy Prizm is idleing hard and will not exlerate
You should have the computer scanned for misfire codes to see if it identifies the cylinder that is misfiring and you may then need a spark plug and coil replacement or plug wires replaced. If only does this when cold...
Question
Can a leaky water pump cause an engine misfire?
A water pump leak by itself cannot cause a misfire unless you overheated the engine and caused a blown head gasket or the coolant gets on spark plug wire causing misfire.
Question
How to fix an engine misfire
A misfire on a cylinder after you have replaced the plug, coil and injector can be caused by a cylinder problem like low compression or valve train problem or injector wiring or computer issue. You should have injector connector checked...
Question
Check engine light on code reads engine misfire what part should I replace first and if that dose not work what next
Replacing parts until the car is fixed can be a very expensive way to do a repair. A thorough diagnosis can save you time and money. But if you have misfire codes, the last digit of the code should indicate...
Question
Q: Power problems
You may have defective ignition module or distributor pip sensor. I would suggest having a mechanic like one from YourMechanic check the problem for you or you can start by replacing the ignition module and see if it helps? You...
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
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...
Question
My radiator went out but I have to pump on gas for it to start
Pumping on the gas does not do anything with a fuel injected car. Try just holding gas pedal at 1/4 throttle and see if it starts better? As far as the hard start if coolant went all over engine you...

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