Engine missfiring change #2 coil pack and sparkplugs

Usually if you know which cylinder, you check spark--fuel--compression on that cylinder.
You could do cylinder balance test, engine idling, kill each cylinder, one at a time. If you kill a cylinder that has no effect on rpms, that cylinder is dead for some reason, spark--fuel--compression?
I usually kill spark and do it quickly.

Hi Justin
you seems that you have a good idea about engines and injection systems, lets say that the computer see's rich exhaust and pulls back fuel mixture. creating misfire. why the engine is misfiring on one cylinder only??
my advice to you
1 search for a vacuum leak corresponding to the misfiring cylinder, like a manifold gasket or injector seal.
2, do a compression test for all cylinders, probably you have a burnet valve.
Good luck and let me know how it goes.

move the ignition coil to another cylinder and see if the miss fire moves. If so replace that ignition coil. If the miss fire stays on that cylinder it is more likely the fuel injector. Was their carbon on the spark plugs when you removed them? This is indicative that the fuel injector is gummed up.

Move the ignition coil to another cylinder and see if the problem moves. If it does it is the ignition coil replace it otherwise it is probably the fuel injector.

is there oil leaking into that plug area?

REPLACE DISTRIBUTOR CAP AND ROTOR REPLACE SPARK PLUGS AND WIRES IF NOT BEEN CHANGED IN LONG PERIOD OF TIME.CHECK IGNITION TIMING.CHANGE AIR FILTER CLEAN FUEL INJECTORS.IF ENGINE STILL MISFIRE IGNITION COIL IS WEAK OR YOU HAVE LOW CYLINDER COMPRESSION.

A misfire alarm typically means the coil pack mounted above the sparkplug indicated in the misfire had gone defective.

To test it, swap the coil pack with another cylinder, and see if the misfire goes from #2 to the cylinder you put it on.

If the misfire continues to be on #2, then consider changing the sparkplugs.

I hope this helps.

Hi:
usually misfire codes are caused by a bad coil pack or an ignition module. You didn't do yourself any injustice by changing the plugs and wires, as that is good preventive maintenance, but you need to keep up the hunt for the problem. You can visually look over the ignition coils, and the modules too, but often they visually look ok, when they act up like yours is doing. You are down to trying to swap out some more parts!

This could be. Does sound like a faulty 02 sensor if it is running lean or rich. It may also be a fautly computer if the o2 sensor are all new.

hello,good day,hoping your car is already scan with hht or star,then engine missfiring very general,you have to check fuel injection and ignition system,hoping your fuel system is clean,if your tester appear your cly.8 coil is defect,try to put cly.8 coil in other cly.for testing purpose,hoping your engine is v-8,119,or 113,or try to check the pressure diapram in fuel rail,ty