|
Re: PO420, P0171 Need Help Please
The seal is near the top of the plug tube. The oil leaks down and puddles at the bottom of the plug tube. When you remove the plug, the puddled oil leaks down the threads and into the cylinder as it's coming out. If the oil was fresh and oily still, this is probably what's going on. Oil getting into the combustion chamber will usually burn off and leave gunky deposits on the plug, not oily oil.
__________________
99 Rodeo LS 3.5L Stroker V-6, 4wd, 31x10.5x15 2 inch Trooper lift, Aisin manual hubs.
03 GMC Envoy XL SLT 4x4 5.3L V8
|