well i have been driving the car and it drive and idles fine, but im only getting a reading of 5 on the vacuum gauge, what could be wrong and could that affect the reading im getting for boost, im running stock greddy kit and boostin stock boost which is 5.5 and it spikes to 7 then comes down to around 5, im just wondering if maybe that could be wrong because obviously my vacuum is off.... what could it be any help or advice is appreciated

 

i just boosted my car tonite and my vacuum is alot lower...around 10-15 i believe.....is that good or should it be close to 0?help us out

 

5 is pretty low.. I was reading 10-15 on mines a friend said that was normal but then again it was on a cheap obx gauge.. make sure ur lines aren't kinked .

 

awesome...so 10-15 on vacuum is good?

 

If you arent idleing at about 20mm of mercury(mmhg), something is a little wrong. Either your gauge reads wrong or you have a leak somewhere. Ultimately you should always idle about 18-22mmhg.

 

Mine sit's right around 22.

 

Most all of the cars that come into the shop are idleing around 20mmhg. If not we normally find a leak somewhere, although there have been a small amount that have been lower, closer to 18.

 

checked the vacuum line behind the gauge pillar and it was kinked so now its around 15-20

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pkoury &raquo;</TD></TR><TR><TD CLASS="quote">Most all of the cars that come into the shop are idleing around 20mmhg. If not we normally find a leak somewhere, although there have been a small amount that have been lower, closer to 18.</TD></TR></TABLE>

Actually it's 18-20 in Hg...not mm.

Like everyone said, check for leaks, and if your idle is fine, it's probably the gauge, the line to the gauge, or the location you tapped for the line for the gauge.