replaced o2, plugs, high-flow cat, vac @ 20, boost @ 3psi please help me

tried to look for vacuum leakes with carb cleaner even though my vacuum is at 20, none found.

any ideas?

 

hey there Sounds like a prob i had, I had 18 to 20 vac but could only boost 3 or 4 psi it turnd out to be one of the big pipes from the intercooler, I had to remove the pipe to see that it was split, worth a look and it only took me haf hr to to it,

Mark

 

Before you replaced all that stuff, what kinda boost were you running? If you weren't having problems before that, it's probably just a loose hose or something..

 

Like said before you probably have a leak somewhere, If you were replacing the o2 sensor the first place I would look is the Y-Pipe coupler piece. Make sure actually take it off and look at it. You should follow the piping all the way to the intercooler and then to the elbow checking for anything obvious. If you dont find anything unusual then see if you can get a buddy to rev the engine with the car in neutrel while you stand over the engine so you can hear and find the leak. If the problem is in fact caused by a leak, its not going to be hard to find scholding hot pressurized air blasting out of a pipe. Good luck!

 

Check to see if map sensor hose is connected..