2006 Subaru Impreza Repair Question

Topics covered: Engine, Exhaust.
Mileage: No information provided.

Asked on December 27, 2010

Vacuum leak

What causes a vacuum reading to decrease over a period of time when the engine is held at a moderate speed?

Asked by nickrov

Replied on December 27, 2010

Vacuum should stay 15 to 20 at steady throttle if it drops could be exhaust restriction

Answered by Docfixit (expert)
18,430 answers provided