Fred's Vettes
Well-known member
- Joined
- Jun 26, 2002
- Messages
- 141
- Location
- Rochester,NY USA
- Corvette
- 1969 Blue/Black 1969 Green/Green Project
I am having a problem trouble shooting a rapid fluctuating needle between 13" and 16"Hg. The vacuum tends to smooth out on acceleration but is very erratic at idle.I'm taking the reading directly from the manifold port and find no gasket leaks. Do valve guides sound like the problem ? Any ideas will be appreciated. Thanks, Fred