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Old 07-27-2020, 12:45 PM   #1
31pickup650
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Join Date: Oct 2013
Location: Akron, OH
Posts: 71
Default Compression Test Results

I have been trying to get my A going again after a few years of sitting around. It ran okay in the fall of 2015, but the following spring/summer, it was having issues going up anything but flat road and I didn't have time to really work on it.

I drove it up and down my road after getting it started last week, but had some pretty bad hesitation/missing under higher load/throttle in first gear. The last time I drove it around, I set the timing and gap on the points. It has a new ignition coil and the spark plugs are also basically new. I did a compression test on the engine because as far as I could tell, the ignition should be working correctly. The results weren't so great:

Hot: 39/36/30/36 psi
Cold: 40/35/30/36 psi
Cold with a bit of oil: 40/35/35/44 psi

These numbers seem quite low. Are they low enough to account for the poor performance in first great or should I re-check the ignition side of things? Maybe fuel related?
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1931 Model A Pickup
My Model A : http://www.fordbarn.com/forum/showthread.php?t=173024
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