Still have no vacuum!? - Team Camaro Tech
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post #1 of 4 (permalink) Old Jun 12th, 01, 03:50 PM Thread Starter
Join Date: Sep 1998
Location: Milwaukee, WI
Posts: 15

As mentioned in a previous question, I just finished 350 engine with Performer RPMcam, heads, etc. Sorted out some timing questions, but I have no engine vacuum. At 18 degrees initial timing and 1100 rpm, I only had 6in vacuum. Now at 14 degrees and 1200 rpm, I have no vacuum - zero, zilch! (Holding finger over a vac. port, there is a little suction, but not enough to register on the guage.) Searched all over for a leak and can't find one. Any ideas? Could there be an internal leak or something? I have no idea where the vacuum is going.
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post #2 of 4 (permalink) Old Jun 12th, 01, 06:54 PM
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Join Date: Jan 2001
Location: Benicia CA
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Bad gauge? I wouldn't think it would idle or run at all with ZERO vacuum.
But I am probably wrong....


69 396 w/SS Trim
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post #3 of 4 (permalink) Old Jun 13th, 01, 05:10 AM
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Try a different guage. I took mine out for a tire roasting last night!

68 RS, Ash Gold,pwr brakes,pwr windows,Hounds tooth,355/T350,MSD 6AL,3200 stall Dynamic converter,3.31:1 posi,Autometer guage pod
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post #4 of 4 (permalink) Old Jun 13th, 01, 05:25 AM
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Location: Washington, Michigan USA
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Sounds like you need a new vacuum gauge - it wouldn't run without vacuum; your previous reading of 6" and current reading of "0" makes your gauge suspect, assuming you have it connected to a direct manifold vacuum source (not "ported" vacuum). Try it direct from the manifold vacuum fitting between the carb and distributor - if you still don't get a reading, you need a new gauge (or the hose on the gauge is plugged).

'69 Z28 Fathom Green
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