Originally Posted by
tlhayes580
This sounds like the same issue I am having . I also replaced MAF, Crank pos sensor. Then plugs, coils, and wires. Did you ever figure out issue? Contemplating a bonfire..... help please.
Fuel pressure should increase under throttle not remain the same. Keep it simple. Fuel, Air, Spark. Before I changed all of those parts, I would have verified I had each one of those. 52 psi is low for that engine and it should increase under throttle. I would have checked the regulator first. I'm not looking at changing MAF sensors unless the fuel trims tell me to.