I have an 88 with a 4.5 Stroker, 24lbs injector, bored throttle body, TB spacer, Borla headers, 2.5 cat, 2.5 Flowmaster 50, 2.5 pipe, 4.56 gears and 35's.
I checked the EGR solenoid, vacuum transducer and EGR, they all check out good. I found that I do not have any back pressure (0.5psi)...