Ok..so you all know about my misfire....its the number 7 cylinder and pissin me off. Iv replaced the plugs with the AC Delco replacements and the wires with MSD's...im still getting a misfire from that cylinder...what else do I need to look at?...my coils?..will a coil from a 2000 5.3 work on my 04?...jus to test...do i need to put my stock PCM back in?...iv had a tuned PCM for around 2 years and no known problems til now..cant be that can it?....all this BS started when i got that tank of bad gas....any help or just ideas would be great....TIA

 

Move your coils around. See if the misfire follows. They maybe after a few other things you can look at coil drivers/PCM.

 

I bet you have crap built up in your fuel rail from the bad gas. we see it all the time from bad gas, #7 is where all the crap ends up, clogging the injector and causing a misfire!!!

 

prob. not in your ignition system at all.

 

I've heard that injector failures, especially #7, are somewhat common.

 

How hard is to move coils like that in case it is that?..How hard is to to remove injectors? and what do ya do to clean them?..Iv never messed with those....Thanks for the ideas