2008 Nissan Altima Q&A

2008 Nissan Altima Question: Why is #4 cyl misfiring after new plugs,coil. if I unplug 4 coil nothing happens

It just started running rough. #4 plug was real black and gummy when I replaced it. Every so often there is blow by smoke when he starts the car. if I unplug any of the coils the engine nearly shuts off, but if I unplug #4 nothing happens. Is it the fuel injector? -
Answer 1
Compression reading was??... Noid light flashing when testing # 4 injector pulse??... # 4 coil actually producing spark when tested with spark tester??? -
Comment 1
I'll have to get these checks done. Right now the check engine light flashes on and auto zone stated the code said #4 cyl is misfiring. -
Comment 2
Yeah, got to do some more testing to get to the bottom of this one!... Start with the compression test.!... That's the main thing at this point! -