I need a little help with my engine, I did a compression check this afternoon and they came in at anywhere from 52 psi to 73 psi. I think this is something like 28% difference, this doesn't look good. I ran the engine for about 30 minutes came home and did the check with the engine warm is this the correct way to get a good reading? also the plugs were really black with soot, they have about 100 miles on them, is it running too rich?
