Ok so I get the following results

(these are new plugs)
cyl 1 120# plug is tan
cyl 2 120# plug is tan
cyl 3 110# plug is black
cyl 4 110# plug is black
cyl 5 110# plug is tan
cyl 6 118# plug is black (little oily)

I tested each cylinder twice and there was little variation. I was not able to see the pressure come up (to check for valve issues)as I was doing this alone and couldn't crank and watch the gauge at the same time.

These readings seem high. I do get black carbon out of the exhaust. The plugs were better after driving for some time. I have only driven it a few dozen miles but lately I have been working on it and it just runs in the driveway.

If this is due to carbon build up in the cylinders will it resolve over time driving it more frequently?

Rich


1953 3/4-Ton Chevy

In the Stovebolt Gallery
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If it can be built ... It can be fixed.

RB53