How do you find vacuum leak on a 91 pontiac grand am?

Its a 1994 Pontiac Trans Am 25th-v8 special. I accidently put bad gas in it and ran on it for a couple miles. Realizing what i did I flushed my tank. (nothing nasty was in it). I have replaced the fuel pump, fuel filter, fuel injectors, distributor,...

I suspect I have a vacuum leak somewhere around the throttle body or the intake manifold. I already changed the intake manifold gasket and while the old one was pretty deformed and corroded, it made no difference after installing the new one. I hate...

I read how brake boosters work and how the vacuum is importaint. 99 Silverado 5.3 has a vacuum leak somewhere and I can hear it at the throttle body. The vacuum hose that connects to ...show more

My car has rough idling, when I'm on [D] but stopped somewhere, the engine shakes. I notice my mileage has been very low since this started and acceleration is slower then usual.... I was told on here, I have a vacuum leak. Is there any way i Can find...

any quick tricks on finding a vacuum leak. with all those little tubes it would take me a million years to find it. its probably a little crack in one of the tubes but dont know where to start. i looked for about 20 mins one day and got so fraustrated...

I have a 1998 suzuki Esteem that dies on me when I come to a stop or when I turn the car on and put it in gear. I replaced the IAC sensor, fuel filter, Pcv valve, and lowered the RMPs because they were to high. My only other guess is a vacuum leak but...

Ive been asking before thinking it was a fuel problem. a friend ran their scan tool and it was all vac codes. they mentioned running smoke through the line. my car wont start so i dont know if that would work. also is a vacuum leak enough to keep a car...

Having some shifting problems on my truck, with 156,000 miles and transmission fluid is good and filled up, and need to find this critter and possibily replace. Can someone explain where its at, what it looks like, maybe how many vacuum hoses come off...