Car Setup

2000 M6
33330 Miles
LS1 5.7 Ported Heads
TR230/224 111LSA Cam
SLP LID

It keeps fouling the #5 Plug... I know that it isn't OIL... It's carbon fouling.

Plug looks exactly like this: Carbon Fouling


Not like this: OIL Fouling


I've switch the 3 and 5 coil packs and the problem stayed with the 5 cylinder. I also switched the plug wires.

Is a faulty injector the only other thing that it could be?

Thanks for any of your help..

 

Sounds like an injector to me.

 

Hey swap #5 injector with it's neighbor. They are easy to swap.

 

I had the compression test done last night. The 1-3-5-7 cylinders all ranged from 145-150PSI on the tester that we used...

The exact numbers were:

#1-150 PSI
#3-150 PSI
#5-145 PSI
#7-145 PSI