I am having a hard time trying to diagnose the probs i am seeing in this truck its all stock - 2003 Silverado 4.8 - RWD 60e
Oil pressure gets up to 87psi at some point in the log and EVAP Purge is all over the place goes to 100% a lot.
Changed oil and filter what came out looked fine, put in 5w30 and new filter, same issue. PCV valve is open, it did not have a check valve "ball" inside of it, was not plugged.
Is it possible that catalytic converters are clogged somewhat and the exhuast is, i guess pressurizing everything? haha sounds rediculous and it could very well be something simple i've overlooked. (Happens 90% of the time)
SCAN FILE ATTACHED
Adam 03 BlackRado 4.8 60e RWD HighOilPSI HIGH EVAP PURGE.hpl