I keep having probs with the stock NGK's . Symptoms are somewhat rougher idle , a slight power loss with a p0300 code . I put new plugs , the code goes away , the cars strong as normal again , but it only lasts a few months before the p0300 code starts randomly setting again and the symtoms I listed above come back . Everytime I take the plugs out , they dont look fouled and they really look pretty normal imo . The outside ring is soot covered and the porcelin on the plug is very light tan bordering on white . My car runs a bit rich @ WOT 10.8:1 to 11:1 from 4500 to 7000 rpms . I dunno my part throttle a/f though , it basically runs rich enuff to cover the tailpipe in soot and dirty up the back bumper over a weeks time , yet it randomly sets a p0171 lean code . The airbox is stock with 9" AEM filter hanging off the bottom and it has been compensated for in the tune Rob did for the car .

I keep putting the stock NGK's in because I had a free-hookup at the dealer . They quit , so if these plugs are prone to problems I dont actually want to pay money for them .

 

wait is that wats wrong with ur fan.


JK