Engine codes p0303, cylinder 3 missfire, replace coil and runs great for 2300 miles and engine again codes 3 missfire, replace coil and runs great again
SOURCE: Jeep Hesitates. P0303 code
Check the cylinders Commpression. over 115 psi is good, 120 psi is normal.
SOURCE: My 96 honda accord is giving me three different
I would start with a full tune up. If it has never been done then that is the best way to start. Make sure that you gap your plugs. NGK plugs are the best for any and all Honda's. Let us know how it goes.
SOURCE: 2004 Audi A4 misfire
it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps
SOURCE: Engine code states cylinder 2 misfire. Replaced
sounds like a bad injector, just connection at the injector, also check for leaks at intake, one more thing , do a compression test on that cylinder start there, good luck.
Cylinder #3 Misfire Detected
What does that mean?
A P0303 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #3.
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Symptoms
Symptoms may include:
A code P0303 may mean that one or more of the following has happened:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
A code P0303 may mean that one or more of the following has happened:
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are you changing the wire
At approx 2000 miles the coil fails, replace it and runs good again
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