Thread: 383 Stroker low vacuum and sluggish

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Low vacume but even compression figures----------oily sparp plugs-ummmmmmmm????? Valve stem seals and/or guide condition on the intake valves---------

Originally Posted by jerry clayton

Low vacume but even compression figures----------oily sparp plugs-ummmmmmmm????? Valve stem seals and/or guide condition on the intake valves---------

Strong possibility Jerry, and it should show with a crankcase vacuum test.

36sedan,

Alright just did the vacuum test on the oil dipstick again. Valve covers were tightened down and breathers were plugged. I plugged all ports in the carburetor and no vacuum. Actually saw maybe half a pound of pressure. Steady .5psi all the way to 2k rpm.

I just tried spraying water on all the gaskets and hoses and got no change. I’m going to order a new carburetor gasket anyways since they’re relatively cheap. Leak down test kit should be here this weekend and I’ll also find TDC then as well. I really appreciate everyone’s help on this.