Re: Idle vacuum - why only 10 inches?
Camshaft being off will show up in cranking compression and your's looks fine.
Just something weird, I once had a similar problem and it ended up being a crack in between the heat passage and intake runner of the intake manifold (cast iron).
I spent a lot of time diagnosing that engine only to fix it when I replaced the manifold. (crack found later)
__________________
My Classics:
'72 K20 Suburban + '65 Dodge Town Wagon
'72 Corvette Roadster +'67 Corvette Roadster
'73 Z-28 Camaro
'63 Ford SWB Uni Pickup
'50 Ford Coupe
|