# compression tests question... **URL:** \ **Category:** PittSpeed Off Topic\ **Created:** [February 25, 2004, 11:41pm UTC](https://forums.speedlife.net/t/compression-tests-question/164376 "2004-02-25T23:41:49Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![BETRAYED93](https://avatars.discourse-cdn.com/v4/letter/b/ed8c4c/32.png) [@BETRAYED93](https://forums.speedlife.net/u/BETRAYED93)\ **Post date:** [February 25, 2004, 11:41pm UTC](https://forums.speedlife.net/t/compression-tests-question/164376/1 "2004-02-25T23:41:49Z")
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… ---
**Author:** ![GNocide](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gnocide/32/5947_2.png) [@GNocide](https://forums.speedlife.net/u/GNocide)\ **Post date:** [February 26, 2004, 4:46am UTC](https://forums.speedlife.net/t/compression-tests-question/164376/2 "2004-02-26T04:46:30Z")
well id say one at a time with no throttle, but im no mechanic. well shade tree maybe ---
**Author:** ![Pewter](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pewter/32/5936_2.png) [@Pewter](https://forums.speedlife.net/u/Pewter)\ **Post date:** [February 26, 2004, 4:57am UTC](https://forums.speedlife.net/t/compression-tests-question/164376/3 "2004-02-26T04:57:52Z")
> _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!!! ---
**Author:** ![Stroker](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/stroker/32/5948_2.png) [@Stroker](https://forums.speedlife.net/u/Stroker)\ **Post date:** [February 26, 2004, 11:04am UTC](https://forums.speedlife.net/t/compression-tests-question/164376/4 "2004-02-26T11:04:58Z")
pull all spark plugs throtle at wot , and put a batter charger on ---
**Author:** ![VisionRx7](https://avatars.discourse-cdn.com/v4/letter/v/f08c70/32.png) [@VisionRx7](https://forums.speedlife.net/u/VisionRx7)\ **Post date:** [February 28, 2004, 6:24am UTC](https://forums.speedlife.net/t/compression-tests-question/164376/5 "2004-02-28T06:24:16Z")
Stick your mouth over the spark plug hole and get somebody else to crank it. Thats how I do mine atleast. 😃 ---
**Author:** ![blackfive-o](https://avatars.discourse-cdn.com/v4/letter/b/3e96dc/32.png) [@blackfive-o](https://forums.speedlife.net/u/blackfive-o)\ **Post date:** [February 28, 2004, 6:41am UTC](https://forums.speedlife.net/t/compression-tests-question/164376/6 "2004-02-28T06:41:47Z")
sick ---
**Author:** ![brokeasskorean](https://avatars.discourse-cdn.com/v4/letter/b/e19b73/32.png) [@brokeasskorean](https://forums.speedlife.net/u/brokeasskorean)\ **Post date:** [February 28, 2004, 12:33pm UTC](https://forums.speedlife.net/t/compression-tests-question/164376/7 "2004-02-28T12:33:08Z")
no throttle,pull one plug at a time,crank over 3 or 4 times,repeat process until done. easy as pie ---
**Author:** ![imported\_gearhead](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_gearhead/32/5957_2.png) [@imported\_gearhead](https://forums.speedlife.net/u/imported_gearhead)\ **Post date:** [February 28, 2004, 2:12pm UTC](https://forums.speedlife.net/t/compression-tests-question/164376/8 "2004-02-28T14:12:19Z")
:rolleyes: WOT ---
**Author:** ![vw16vcabby](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/vw16vcabby/32/5943_2.png) [@vw16vcabby](https://forums.speedlife.net/u/vw16vcabby)\ **Post date:** [March 2, 2004, 7:15pm UTC](https://forums.speedlife.net/t/compression-tests-question/164376/9 "2004-03-02T19:15:04Z")
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. ---
**Author:** ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)\ **Post date:** [March 2, 2004, 7:20pm UTC](https://forums.speedlife.net/t/compression-tests-question/164376/10 "2004-03-02T19:20:37Z")
WOT w/ out fuel… pull 1 plug at a time… spark is irrelevant ---
**Author:** ![Stroker](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/stroker/32/5948_2.png) [@Stroker](https://forums.speedlife.net/u/Stroker)\ **Post date:** [March 2, 2004, 7:22pm UTC](https://forums.speedlife.net/t/compression-tests-question/164376/11 "2004-03-02T19:22:57Z")
i always pull all 4 ---
**Author:** ![imported\_gearhead](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_gearhead/32/5957_2.png) [@imported\_gearhead](https://forums.speedlife.net/u/imported_gearhead)\ **Post date:** [March 3, 2004, 6:36am UTC](https://forums.speedlife.net/t/compression-tests-question/164376/12 "2004-03-03T06:36:05Z")
> _Originally posted by turbotalon91_ > **i always pull all 4**