Intake mani vaccum

[adams86lxi]

So anyone know what the intake manifold vaccum should be at idle for a efi accord?? I think i got a leak somewhere just trying to figure it out. Thanks!

[A20A1]

about 24"-28"

I think

[bobafett]

sounds about right. :) with my 272 cam i pulled like 22-23" at 900rpm idle. :) snap off the throttle and it will pull a bit more. :)

[adams86lxi]

yep... i deffiently have a vacuum leak then lmao.... Its weird because the car is still idleing really really low even with it. Im getting like 10-11 for vaccum lol...

[A20A1]

I used to get about 10" with my colt cam at a low 500-800 rpm idle.

[adams86lxi]

I used to get about 10" with my colt cam at a low 500-800 rpm idle.

hmm. im just stock cam with a big turbo lol...

[LiTtLe xOx BitT]

I have a Vacuum gauge in my car and it reads about 23 when idleing at 800-900.

[AccordEpicenter]

if everything is running correctly and the engine is good it should be at least around 20 inches. If its not anywhere near there and the engine is running good , check for vac leaks and check your gauge first

[A20A1]

wait you're turbo? does turbo lower the vacuum or is the vacuum still good when the throttle body is closed.

[bobafett]

yeah other wise those helpful brakes wouldnt work quite as well. like on my car currently. (no vacuum with 282 cam without idle hehe)

[bobafett]

i cant speak for boost, but the brakes definetly fell weaker on my car with low vacuum

[AccordEpicenter]

they have a checkvalve so the boost wont eff up your brakes on boost, plus once you snap the throttle body shut youre back into vaccuum in hundreths of a second