Showing articles & questions for topic
Misfire

Related articles

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,...
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.
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
Why is my car act like it's in limb mode
The P0300 code is for a misfire condition with the engine. This code is typically set when the computer can't determine which individual cylinder the miss is occurring with, or if it is a multiple cylinder misfire. Otherwise, the computer...
Question
Misfire happens at 1500 rpm's.
Hi there. Check the fuel injectors one at a time by disconnecting the harness and see if the engine stumbles or not. If the engine stumbles when the injector is turned off, then the injector was working. If the engine...
Question
cylinder number 4 has a misfire.
Billing question sent to CS for the cost to diagnose and repair a possible burned valve on a 2008 Jeep Commander with a V6-3.7L engine.
Question
Starts fine then after a minute or so starts to misfire.
Hi there. Check the oil pressure to the fuel injectors and see if the pressure is dropping. The injectors require the oil pressure to make them work and if the pressure is dropping, then the injectors will not fire. If...
Question
Upon starting my car it makes a loud hollow noise. There is also a rattling sound is coming from exhaust pipe.
Hi there. The engine may have a misfire causing the exhaust pipe to have a rattling noise as the engine is shaking. Check the fuel injectors and the spark plugs and see if they are working and if they need...
Question
2003 Mercedes c240 4matic - 51K miles P300,P304,P305,P306 when runs over 4000 rpm
300 Series codes are misfire codes. The P0300 is a random misfire and the 304,305 and 306 are specific cylinders. The ECU can detect misfires that are so slight that you may not even notice them; that is, until a...
Question
replacing ignition coils due to misfire
when replacing the coils, it's very important to get the ground wires in place. These are small gauge brown colored wires that have eye loops on the end to attach to bolts on the engine and sometimes on the coils....
Question
Car runs rough sometime an engine diagnosis says I have a misfire in three of my six cylinders sometimes car runs smooth other tim
Hello, thank you for writing in. When it comes to a misfire on several cylinders, the vehicle is likely struggling with compression. If the issue was fuel or spark related, the engine would have a misfire code on all cylinders....
Question
One cylinder doesnt seem to be firing.
If the engine was running fine before the injector swap out, then the cylinder that is not working properly has an injector that is not working. I recommend installing new injectors and not re-manufactured injectors as they can fail. If...
Question
2c9d code and misfires on the cylinders 4, 5, and 6.
Hi there. The oil could have gotten on the spark plugs causing the plugs to not fire. Take out the spark plugs and see if they are covered in oil. If they are clean them off with carburetor cleaner and...
Question
When driving my car has begin to skip and also my car shakes when i get up to about 70 mph 2010 Chevrolet Traverse
Hi - the shaking you are experiencing could be caused by either an out-of-balance tire/wheel assembly, bent wheel, or a failed Constant Velocity (CV) joint in your front axle. If you feel the shaking directly in the steering wheel, the...
Question
My car stopped picking up speed
When the check engine light is flashing, it means that you might do damage to the car by continuing to drive. In this case it sounds like you are experiencing a misfire and that means you run the risk of...
Question
Why does my truck misfire in third gear 1999 Ford F-150
Hello If you are getting a random misfire code at higher speeds then you may have a fuel system issue or an air flow problem. I would usually test the fuel pressure to make sure that the pump is fine...
Question
Check engine light is on car sluggish and shaky
Your check engine light is on due to the misfire and engine running issue and should not be due to the oil change overdue. You should have the check engine light scanned then the code can identify that cause of...
Question
Mis-fire
Carefully check the EGR system. If EGR is stuck open you can get global misfiring. Check integrity of PCV system. The fuel system needs to be ruled out including the mundane, but real, possibility that you have a tankful of...
Question
My car seems to have a hole in one of the hoses. Car keeps misfiring and idling up 2005 Mazda 6
Hi there - your misfire symptoms suggest an air leak in the engine intake system. This could be an air inlet hose as you suggest, a loose or leaking gasket in the manifold or vacuum hoses, or cracked component which...
Question
Engine is misfiring and the service engine soon light is on.
Hi there. If the engine is misfiring you would need to check the spark plugs and fuel injectors to see what is not working. If the spark plug has no spark, then check the spark plug wire for spark by-passing...
Question
I have code P0305 on it. Ive heard it's cylinder #5 misfiring but I don't know what the issue may be.
The code P0305 is indication that cylinder number 5 is not firing all the time. When you see the check engine light flashing then the cylinder is actively misfiring. You should have the spark plug and coil checked for problems...
Question
Entire bank1 misfires, and lower compression. 1997 BMW 540
Hi there - yes, it is possible to have cam timing for one cylinder bank off after a timing chain component repair. Way too easy actually with this engine! If you did not loosen the cam sprocket to cam bolts...
Question
My 1200 hp rotary engine keeps misfiring at 7000 rpm's.
Hi there. It sounds like the spark plugs and ignition coils are not working at the desired speed that the engine is turning. I recommend replacing the spark plugs and the ignition coils. If you need further assistance with your...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question