ChrisVH

computer came up with misfiring detected i need to change my spark plugs would this be the reason for it running rich???

any help would be good

thanks
-chris

Ed Wright

iTrader: (1)

Yep. A miss-fire puts oxygen into the exhaust, same as a lean mixture. The 02 mili volts go low, same as with a lean condition. The PCM can't tell the difference, so adds fuel to try to correct what it "thinks" is a lean mixture.

ChrisVH

alright thanks thats what i was thinking now i get to change my plugs tomorrow damn I have god damn stock manifolds