ive done a few compression tests before but i hear a couple different ways!
basically my questions are
pull out one spark plug at a time or all of them?
hold the throttal WOT? OR NOT?
I WANNA do a compression test the right way before i yank the motor and tranny out of the six…
well id say one at a time with no throttle, but im no mechanic. well shade tree maybe
Originally posted by Gnocide
well id say one at a time with no throttle, but im no mechanic. well shade tree maybe
& disable the spark & fuel!!!let the motor spin at lease 3 times!!!
pull all spark plugs throtle at wot , and put a batter charger on
Stick your mouth over the spark plug hole and get somebody else to crank it. Thats how I do mine atleast. 
sick
no throttle,pull one plug at a time,crank over 3 or 4 times,repeat process until done.
easy as pie
:rolleyes: WOT
i pull all 4, and go wide open throttle w/ coil and lead to injectors un plugged so no fuel or spark is given.
if u go one plug at a time, and air is leaking to the next cylinder, it will pressurize still b/c that chamber is sealed. however, if that cylinder has the plug out, then the air would blow out if you were in fact leaking.
kinda like doing a leakdown test. pull all the plugs out, and set piston manually to a bit b4 tdc, and run the test. u’ll hear where air is leaking, as well as the reading on the guage telling you the % of leakdown.
WOT w/ out fuel… pull 1 plug at a time… spark is irrelevant
i always pull all 4
Originally posted by turbotalon91
i always pull all 4