FCs4226

so my motor was reading -12 vac on the aem boost. and not its reading like -6.7 or 7-.8 . can someone help me out and tell me if this is good??? motor was rebuild 3 months ago. with street port.

Vert88t2

iTrader: (4)

-Check your vacuum line to to gauge.
-Check all vacuum lines for cracks or leaks.
-mine usually reads -15 on idle if that helps

FCs4226

and my car idles fine. so its a leak?

FCs4226

could it be just the hot weather??? in socal.

RXSpeed16

iTrader: (41)

Probably a leak unless you notice the engine is running much worse than before. Fresh, stock port engines should pull near 20 in/hg. The quality of the rebuild parts, break-in process, and porting will all factor in, though.

The reading won't be affected by weather this much.

Vert88t2

iTrader: (4)

A quick way to check for leaks is to spray your vacuum lines one at a time with carb cleaner and listen for idle changes... Try not to spray it on anything hot like the manifold. It's not the best way but short of replacing all the line this can help find the leak.