jblack245

i got the mods listed below in sig. seems like once a year all four plugs on passenger side foul and go bad and also my 02 sensor on that side. the car sputters and check engine light comes on for mulit missfire. the four plugs on driver side are always clean and the 02 never goes out. any1 know why?

rich Z

Check for a vacuum leak on that side.

jblack245

what are things and places to check? i dont throw any other codes

WS6addiction

iTrader: (1)

Could be an exhaust leak creating a false lean reading on bank 2. That would make it run rich on that side.

Ls1Rook

iTrader: (1)

Had the same problem, changed my o2's still have to check if that was it.....