air leak at idle set screw?

joenintiesc

joenintiesc

Registered User
I did an air pressure test by pressurizing the intake to about 12 psi through the tb, and air is coming through the idle bleed set screw. Is this normal? It probabbly wouldn't equate into a boost leak, but might be the source for a vacuum leak. If it is not normal, can I seal it somehow? It's a 75mm BBK Supercoupe throttle body...

Thanks.
 
joenintiesc said:
I did an air pressure test by pressurizing the intake to about 12 psi through the tb, and air is coming through the idle bleed set screw. Is this normal? It probabbly wouldn't equate into a boost leak, but might be the source for a vacuum leak. If it is not normal, can I seal it somehow? It's a 75mm BBK Supercoupe throttle body...

Thanks.
Click to expand...

The IAC valve is always open so it shouldn't be an issue. The set screw itself is never subject to vacuum. You can seal it with any thread sealer though if you would prefer.
 
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