warm is ideal and gives you the highest readings but a cold test will for sure suffice here as we are seeking a cyl that is not doing it's job (for one reason or another)so we can rule out the long block so the variations and of much less concern the total will tell us if your long block is healthy. EDIT be sure to block the choke and the throttle all the way wide open

Last edited by RapidRobert; 02/06/10 11:57 AM.

live every 24 hour block of time like it's your last day on earth