Quote:
Originally posted by morlock
on the engine, I don't have a vacuum leak
|
Are you sure
It's possible you have a small hairline crack on your intake manifold, you will not hear the leak, and It's very hard to see. You may need to use a mirror to look underneath the Intake manifold.
Hook up a vacuum gauge to the Intake manifold, start the car, the gauge should read about 12 to 20 pounds. It should not fluxuate much, If it does, you have a leak somewhere. I've also seen that a broken or weak valve spring can cause this problem.