my 91 ss turbo boost only goes up to 3psi (wastegate pressure is 9psi). what are the symptoms of a stuck wastegate? could also be leaks at the intercooler piping....

car runs fine, just doesn't boost.

thanks in advance.

 

I've seen this happen with cracked piping/inlets etc.

 

just pulled the intercooler out to check on the hoses and nothing.....wonder what else it could be....

 

A stuck wastegate would have the opposite affect, and you would have more boost than you wanted, cause the wastetgate would not open up getting rid of some of that exhaust gas spinning the turbine wheel.

 

leaks on the exhaust?

 

what size external is it? and did you run race fuel?

 

not if it was stuck open.

if you had cracks in your piping, your car would run like **** as you are leaking metered air.

you can put pressure to the WG and see/watch if the arm moves with 9psi

 

HAHAHAHAHAHAHAHAHA oh wow, I didn't even think about it being stuck open, just stuck closed.

 

ok, stock SS has that tiny turbo, my friend(hardware89) has one. u put what IC on it??? since it didn't come stock with one.


if u think it is shut closed, take ur dp off and try to move the wastegate man

 

if its not making boost then the WG will be stuck wide open and diverting the exhaust away from the turbine.
I would put pressure to the WG and see if the arm moves @ 9psi

 

exactly, so easy check, see if either the wastegate control arm is even attached before doing any of this, then take the dp off and see it maybe it is just stuck open, and then apply pressure to it via a air hose.