Austin Pennington

Hey guys, never posted to a forum before but I'm at a loss.

I have 2011 GT: MT82, built engine, P1SC, Supporting mods.

When I start the car there's a rattle for a second or two from right underneath the valve cover and at WOT the car falls on its face hard at about 4000 rpm. No codes.

Ive checked off a couple things: Datalog looks fine, no detonation. Changed the plugs and o2s because I had some lying around, drivability is perfect otherwise, reloaded tune.

Another thing, probably unrelated, the issue may have started around the time I did a crank relearn (car ran fine but I realized I never did it when the engine went back in)

Any Ideas? Cam Phaser? Checked the vct solenoids and they were good.

2000AZ5.0GT

Granted, my 2011 isn't supercharged, but I did used to have a 2000 GT that was supercharged (vortech T-Trim).

I'm guessing it's intercooled, have you tried checking for boost leaks? I imagine that at 4000RPM, that's probably when it starts building boost.

Austin Pennington

I don't thing its boost leakage but it's going on the lift tomorrow so I'm gonna double check. Hopefully I can figure it out soon. I have a D1SC and a 4r70w just waiting to go fast.