avlon06

my rmps have been haning bad and i think it might be a vacum leak.. just needed to know how to look for one or what to look for..thanks

tbirdscwd

The easiest way is to get a can of carb/choke cleaner, start the car and let it idle, then spray the can of cleaner around the engine compartment. When it gets close to the leak the idle will level out and run smoother. Move slowly around the engine bay so you don't just spay over it fast and miss the leak. There are only a few areas where you have vaccum lines, so it shouldn't take too long to find.

contentsunderpressur

^ +1

1999 GT

its probably the vacum leak...if it idles choppy

avlon06

took my car to a mechanic and we tried changing out the tps but it wasnt that and then he was doing his checks on the intake and couldnt find the exact spot and then told me i might have a crack in my intake manifold. how f"d in the a am i?

avlon06

bump

Darkcrime

they aren't that expensive, or hard to replace either. MAYBE MABYE 2-2.5hrs labor, tear down/rebuild (can't really call it a "tear down"). I think you can get a new intake manifold on ebay for like $200-$300

tbirdscwd

A crack in the manifold is possible but its much more likely you have a vaccum line cracked or split. If it is the manifold, its not that big of a deal. If you are decent with tools, then it'll cost you about 150-200 for a manifold and gaskets. If you take it in it'll cost that plus a couple hours of labor.

By the way, does it just run bad at idle? Did you try cleanig your IAC? That is also a common problem with these cars that causes idle issues.