I have a 5.3 bored to 5.7 stage 2 tsp cam, 799 heads. The Bank 2 O2 is reading 3% richer only at idle. I changed the intake gaskets and I'm trying to determine if this is a weak 02 issue or something wrong with the heads. Maybe an exhaust leak? The intake is a TBSS. I've sprayed carb cleaner all over to test for vacuum leaks.
24-05-20 21-22-23.hpl
tune 146 after intake gaskets replacement VE correction.hpt