My brother's car wasn't running real great at all. Pulled all of the plugs and went to do a compression test. Screw in guage, crank car over... and wham it fired and "idled". PSI on the meter was coming up around 700-800psi. The motor was so shot the oil/gas mix in the cylinders was deiseling and allowing it to "run".

Never really seen that before and wanted to pass it on