Any PCM codes? Does the truck run poor?
Any PCM codes? Does the truck run poor?
'91 2WD RCSB
5.3l L59 DBW
4L80E
TR220 cam
RevMax 2800rpm stall converter
Schoenfeld LT Headers
Nelson tuned
My Truck Video - http://www.youtube.com/watch?v=Rw9y1...&feature=email
very likely bad 02 sensors. Have the 02 levels scanned with a wideband
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709