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Re: Idle vacuum - why only 10 inches?
Quote:
Originally Posted by davepl
I did, but low steady vacuum just comes up as late valve timing, which I don't know how to check short of degreeing the cam, and I don't want to pull the motor apart like that if I don't really have to. If I could confirm it had to be fixed, I'd go for it, but it's a lot of work to rule out a possibility...
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What did you vacuum read when opening and closing the throttle rapidly? Needle pulls down to zero? ...Indicates rings. Just looking at the Dieselhollic chart for other possible answers.
I also have low vacuum and It pulls down to zero, but I have good compression and no blue /oil smoke out the exhaust. So I question the chart.
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1970 C10 Short Stepper with 71/72 front clip.
Last edited by BugzC10; 09-08-2016 at 06:21 PM.
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