I'm having a very hard time getting a good definitive answer from searching. Idle is right around 750-800. I'm now pulling about 15 inHG. I seem to recall it being 18-19 a few months ago. Stock motor with about 60k.

Just trying to track down a boost problem.

Thanks

 

Varies between cars but I seem to recall stock with at least 16.

 

What should it be with out an air pump?

 

For comparison, mines 16inHg at the same idle w/ 59k on the stock motor. My compression is good, and I had my vacuum hoses replaced 4 weeks ago. So if your car is fine otherwise I wouldn't worry about that vacuum reading. Every car is sightly different.

 

My Auto's vacuum at idle varies from 16 to 17 with the lights, A/C and radio off.