Vaccume leak and cant find it

[boosted99_420]

Ok so title explains it. I got my car running again a few weeks ago and have had a vaccume leak since then. Its a BAD one to when you start the car it starts then stalls and you can hear a loud puff of air shoot out from somewhere by intake manifold. So i was thinking Intake manifold gasket was bad changed it and it is steal leaking bad. It sounds like it is coming from the PCV or somehwere in or around intake manifold its self. When you have the car in boost load on the engine it doesnt leak at all but once you let off gas or take load off you hear it. I mean the car runs good, and drives good just idles high and has rough starts on colder mornings. If anyone has any idea of what it can be let me know as soon as possible.

PS: I already sprayed it with starter fluid and nothing happened. And im not 100% sure but a boost leak wont find a vaccume leak.

 

[Boostinsideways]

Back of the intake manifold sounds like brake booster.

 

[boosted99_420]

ill try that i dont think there is a hose clamp on it so that may be it. Didnt think of that one ill update tomorrow before i go to work.

 

[98yctuner]

make sure the couplers aren't cut and leaking air, have you replaced your vacuum hoses? if not that would be a good idea. have you tried a boost leak test? my car right now has a leak through the intake manifold gasket, so that could be another possibility

 

[bryanwheat]

A boost leak test would show any vacuum leak, unless it's the booster hose after the check valve.

 

[duecevr4]

Try those damn injector seals and o'rings! Freakin' things will get pinched or break in a hearbeat.