Erratic Vaccuum readings
#11
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#13
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#14
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#15
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Not much more to check Maybe the front carb is screwed up causing those cyls to either run lean or flood? seems to be a very odd set of symtoms. keep us posted
#17
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Typically when a vacuum gauge is erratic, there is a problem in the valvetrain. Either a rocker is out of adjustment, a lifter has collapsed, pushrod out of the rocker, etc. Pull the valve covers and start looking. I would bet that you will find your problem.
Eddie
Eddie
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#20
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Typically when a vacuum gauge is erratic, there is a problem in the valvetrain. Either a rocker is out of adjustment, a lifter has collapsed, pushrod out of the rocker, etc. Pull the valve covers and start looking. I would bet that you will find your problem.
Eddie
Eddie
Remember, it starts out with a good idle and go's bad.
I noticed a tiny drop of water on the spark plug when I pulled it out so I pulled the header and there was small amounts of water in each pipe (tea spoon). I'm thinking it was reverting water when the idle dropped down lower. So I swapped headers with the good motor and same bad idle. Could it be that there is a crack or blown head gasket that when the cylinder warms up the crack or leak opens and lets moisture in and shuts down the spark plug.