hey everybody I was wondering if I could pick your brains. I recently had my car hooked up to a snap-on tolls SUN machine for a diagnostic. and I was wondering if anyone could help me understand the cylinder readings 'cause the mechaninc I talked with was not very informative to say the least. so here is the results CYLINDER CONTRIBUTION: CYL MIN RESULTS MAX 1+ -1 0(downward pointing arrow) -21 3- -1 3(downward pointing arrow) -21 4+ -1 3(downward pointing arrow) -21 now the machine gives probable cause as a cracked distributor cap. Though it was replaced less than a year ago and I highly doubt it is cracked. If any one out there knows exactly what those numbers represent please let me know.