Why my vac drop??

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Mar 10, 2002 | 10:09 PM

Maxboostrx7

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Why my vac drop??

After installing pulleys (PS, Alt, WP) and removed air pump.. my vac is reading 15 now.. but it used to be read 17 when car was idle'n.. is this normal?

let me know

thanks!

Mar 10, 2002 | 10:10 PM

mightyslash

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From: West Coast

That's pretty low, but it also depends on the rpm too.

Mar 10, 2002 | 10:12 PM

Maxboostrx7

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Quote:

Originally posted by mightyslash
That's pretty low, but it also depends on the rpm too.

Maybe my vac hose is losing?? does pulley upgrade changes RPM too?

Mar 11, 2002 | 06:14 AM

Dont_Be_A_Rikki

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I noticed the same thing. just raise the idle up a bit 150-175 rpms should do the trick.should run @17-18vac

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