Mr2 Overboosting problem

[closmr2]

Hey Toyota Nation first time posting on here. I had a question about my 92 mr2 turbo, it seems that when ever i get on the gas my boost goes up to about 14lbs than it cuts off i know that the cut of is the fuel cut defenser but i was wondering what can be causing my car to overboost everytime i step on it . My car only has an intake and dual greddy exhaust no engine mods or boost controler. Thanks for ur help Toyota Nation
Clos

[MR2Jedi]

sounds like your wastegate may be stuck or actuator is failing...

[JekylandHyde]

Any improvement in the OEM exhaust will be enough for you to hit fuel cut.
Fule cut only comes at 12 psi, not 14.

[onehotcamry]

mods usually bump ur boost up a little

edit* saw that the doc posted already :p

[MR2Jedi]

is your fuel cut disabled? are u sure you're hitting 14psi? what kind of boost gauge are u using?

[manny0ne]

wow, i was actually gonna post the same exact thing. I have a '91 turbo and i have my fuel cut disabled. I'm actually hitting 15 psi, though. -=/ I bought the car with intake and turbo XS BOV. Sure doesn't pull like 15 psi ;( Any ideas?

- Oh, i'm using an Autometer mechanical boost gauge.

[Drifting Dane]

switch back to stock bypass valve? they perform better than your aftermarket bov.

[manny0ne]

yeah i'll have to try that, too ;( i raced my best friend in his 2.. it sucked real bad ;(

[closmr2]

Thanks i'll have the wastegate checked out and the actuator. I'm using an autometer gauge thats hooked up straight to the boost line on turbo and not the boost sensor.