Ran 4psi now only 8 whats wrong?
 

i have a turbo on my car for about 2 months now and it was running great at 8 pounds boost. now it seems to only run 4 pounds boost. we checked: intercooler piping, B.O.V, wastegate. the turbo spools but wont create anymore boost then 4psi at any time. what could be wrong??

Re:Ran 4psi now only 8 whats wrong?
 

crack in your exh mani, ?? maybe its not getting as much pressure as it did before, or check where the manifold mounts to the head, where the turbo mounts to the adapter plate or plate to turbo, only thing i can think of if you checked all that other stuff...btw you shouldve just bumped your other post to get it to the top, reposting sucks

Re:Ran 4psi now only 8 whats wrong?
 

maybe change your air filter, i ran a shop rag air filter and couldn't get any boost after a while cause it got so much gunk stuck in it that it reduced airflow to the point where the turbo couldn't suck in enough air to be in boost

Re:Ran 4psi now only 8 whats wrong?
 

also check your couplers. If you arent using good couplers they could crack and cause a leak in pressure.

Re:Ran 4psi now only 8 whats wrong?
 

Yes all of the above. Check all the couplings for small leaks. Retorque all your bolts in the manifold and turbo.

I was reading the subject of this thread and didn't get it until I opened it up. Ran 4psi and now only 8psi ;) ;D

Re:Ran 4psi now only 8 whats wrong?
 

fixed?

Re:Ran 4psi now only 8 whats wrong?
 

what was it???