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12-08-2019, 03:02 PM | #1 |
Senior Member
Join Date: Jan 2016
Posts: 2,097
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Compression test and Vacuum test readings need help
Can you help decipher what the numbers are saying, and what would you do?
I have a 6.1 head, bcarb, intake bored. I forgot to put oil in the cylinders after each cylinder test, throttle is wide open, engine is warmed up. Compression test. 1:100 2: 90 3: 70 4: 70 Vacuum test: Idle 20. At idle the needle bounces quickly between 20 and 22. High RPM 18 Needle is always steady throughout the test, except at idle When I let increase throttle quickly it drops to 0 then goes to 25, then back to 20. Last edited by old31; 12-08-2019 at 05:12 PM. |
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