what would cause no fire to cylinder 4 to my nissan altima 2.5L engine? on 2005 Nissan Altima

I have replace both crank and cam position sensors,placed injectors, replaced spark plugs, and swap coils and I still have no fire to cylinder #4.

by in Eagle Pass, TX on July 28, 2012
2 answers
ANSWER by on July 28, 2012
poss computer issues do you have any other code than po304. you may need to seek diag on this
ANSWER by on July 28, 2012
Have you checked for ignition fire with a spark tester hooked to the coil to see that there is no spark? How much comperssion on #4? Injector pulse ok when checked with noid light? Coil feed circuit&connector ok?

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