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1G: compression test question

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Newbie Forum: Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum. Probationary Members must limit their tech posts to this forum and sub-forums.

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Old 06-13-2012, 11:52 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #1 (permalink)
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compression test question

Is it necessary to have the intake manifold, throttle body bolted in order to do a compression test?




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Old 06-13-2012, 12:04 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #2 (permalink)
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ive always done mine by removing a spark plug one at a time,
then sticking the tester down in the hole, and bumped the switch 3 times.
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Old 06-13-2012, 12:11 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #3 (permalink)
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Just have the throttle plate open so it can easily pull air into the cylinders.
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Old 06-13-2012, 12:33 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #4 (permalink)
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Quote:
Originally Posted by SilverEclipse96 View Post
Is it necessary to have the intake manifold, throttle body bolted in order to do a compression test?
No, you can do a test without the intake even bolted on. Remove all 4 plugs so that the engine spins easier.
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Old 06-13-2012, 01:13 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #5 (permalink)
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Remove all spark plugs, install tester do not tighten to much, remove engine fuse, press throttle (if still installed) and crank for a few seconds.
Last edited by red_devil; 06-13-2012 at 05:54 PM.
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Old 06-13-2012, 04:06 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #6 (permalink)
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throttle body does not need to be on! be sure to do a wet and dry test as well!
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Old 06-14-2012, 12:57 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #7 (permalink)
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Quote:
Originally Posted by 92boostinawd View Post
throttle body does not need to be on! be sure to do a wet and dry test as well!
^^ great advice
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