installed hooker lt's, now have SES. help please!!!
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I'd lean toward either leaks at the header collectors or at the flanges to the heads ... OR ... if you have extension wires on the front sensors, they may be wired incorrectly (crossed wires between the male & female ends).
The rear sonsors do not effect the tuning. They just monitor the cats. When eliminating cats, you must use simulators in place of the rear sensors to keep the codes for the rear sensors from turning the engine light on (or tune them out with LS1 or similar tuning). You can leave them disconnected if you don't mind the light....
Anyway... your codes are with the FRONT sensors.. so concentrate there.
Gordon
www.provenperformanceconcepts.com

