99 maxima GLE Well after replacing the coil packs and spark plugs. The code still coming back what else can it be ?? Please help

 

what brand coils did you use?

 

Nissan but I just tested the power to the coils. The back 3 get 12v and the front 3 only get 8v what could be the problem ?

 

wiring fault.

 

how do I troubleshoot that wiring problem ?

 

start pulling the harness apart and look for problems. all 6 coil feeds are off the red wire that also provides 12v to pretty much every sensor and solenoid on the engine. the wire is fed from the eccs relay. considering you say front cylinders get 8v the problem very likely lies between those coils and the main harness.

be 10000% sure you know what youre doing so you dont lead yourself down the wrong rabbit hole.

 

oh man seriously ? I guess I have my work cut out for me