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so i have stock i/c, turbo, everything pretty much. i have straight 3in intake, boost controller, boost gauge. and i've been boosting at 12-14psi pretty solidly, but recently it only wants to go to 7psi and getting there feels way to labored. i'm not sure what this is, but after a bit it sometimes decides to boost fine. i don't know what would cause this...my oil pump is leaking i think, would this effect that somehow? anyways, thanks for any advice.

Check the wastegate, its line and for any boost leaks.

alright sounds good. a vaccum leak would cause this maybe right? i think i might have one because at idle it changed between 15 and 19.

Could, yeah. But unless the vac leak was very large, you should still be able to boost up to a certain psi and be running richer.

An exhaust manifold gasket leak can cause the symptoms you are describing.

But with that vac going from 15-19, I would comb over the vac lines and vac plugs (if you have any), see what you can find.

Check all your couplers between the turbo and TB too, make sure they are good and tight, and have no cracks/leaks.

Bryan

alright, thanks man. i will check into those too. thanks for the advice.

it sounds like you blew the knock sensor to me.computer goes into safe mode.

best knock sensor to get is gm knock sensor out of 88 camaro.heavy duty great replacment.twos are us sells them.

but it still boosts fine everynow and then. why would this be? i think maybe i have a boost leak. my turbo to i/c coupler is pretty old..