Why my vac drop??

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03-10-02, 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!

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03-10-02, 10:10 PM

mightyslash

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

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03-10-02, 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?

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03-11-02, 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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