Vacuum readings...

[xmikevankuikenx]

My vacuum gauge reads between 5-6in at idle. Is this normal? I thought it was supposed to be somewhere near 20 at idle. Maybe it has something to do with my mods. Any ideas? I used a t-fitting on the red line infront of the plenum/tb.

 

[forum155pl]

are you sure you didnt hook it up after the EGR Silinoid?

 

[Dragstr05]

If its lower than its supposed to be, blame it on your cams.

 

[OUR01GT]

My vacuum gauge reads between 5-6in at idle. Is this normal? I thought it was supposed to be somewhere near 20 at idle. Maybe it has something to do with my mods. Any ideas? I used a t-fitting on the red line infront of the plenum/tb.

Mine runs about 18 ins. at idle with the bolt ons I have. I also think it's because of your cams.

 

[Mike97gt]

where are you taking the reading from?

 

[Red2000GT]

You should use a hose that is attached directly to the throttle body or plenum. There are a few of them coming off the lower portion of the plenum that should be suitable,on the back side of the plenum if i remember correct. With those cams you should expect 13-16 inches of vaccuum.

 

[forum155pl]

i didnt see that he had cams... ive seen that alot with cammed cars..

 

[hotmustang331]

My VT cammed GT idles @ 16-17. Your vacuum source isnt accurate....thats what im guessing.