my car idles a little jumpy after i replaced the head gasket... but i've think i have a vacuum leak may be behind the intake manifold.. when i take the iacv off its suppose to idle really low, but when i pull the plug off of it, the car automatically turns off and i hear a whisling noise behind the manifold. is this normal or can someone help me pin point this problem. i am thinking i have a vacuum leak.

 

One way to find out if you got a leak and where to find it is to spray carb cleaner around the engine (in sections). If the engine starts to idle differently, then that's the general area you'll find the leak.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jbs &raquo;</TD></TR><TR><TD CLASS="quote">One way to find out if you got a leak and where to find it is to spray carb cleaner around the engine (in sections). If the engine starts to idle differently, then that's the general area you'll find the leak.</TD></TR></TABLE>That works, but really unless its causing a CEL the next step would be to start replacing vac lines. Have fun

 

The way i check if cars have vaccum leaks is by getting a vacuum pump with gauge from autozone (less then 20 bucks) and hooking a vacuum up to a vac source and see what it runs.

 

well my car is turbo'ed on my boost gauge it will go from 20inHg drop down to like 10-12 inHG, my car feels like its going to die then jumps back up.