I keep trip the same misfire code in cylinder 3, even after tuneup, new plugs, wires, cap, rotor, etc. Any advice? I can turn a wrench but am no means a mechanic. Thanks.

 

start with a compression test

 

Is the misfire only at idle or at driving speed as well? Could be an intake manifold leak. Usually if it gets better as the RPMS rise it indicates a vacuum leak. If it remains with the rise in RPMs it is either spark, fuel or compression issue. Also in addition ohm out your injectors to see if cyl 3 is off.

 

I'm leaning towards a bad/clogged injector. You'll know the injector is bad when you switch injectors with another cylinder and the mis-fire follows the injector.

Are you getting any other codes?