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How to do a compression test?

  • Thread starter Thread starter zZsKyZz
  • Start date Start date Aug 7, 2006
Z

zZsKyZz

Member
Dec 1, 2005
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Aug 7, 2006
#1
  • Aug 7, 2006
  • #1
After my runs at the track I've been thinking of everything I can try to figure out what is wrong with my car.. I've never done a compression test and I was wondering how hard it is and if anyone here can tell me how?
 

Therian

The Highlander
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Apr 21, 2002
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Waterloo, Ontario
Aug 7, 2006
#2
  • Aug 7, 2006
  • #2
the search function is your best friend when it comes to these things. There's many threads that discuss it, and you'll get the information you need a lot faster than waiting for people to reply. You can do it yourself, you'll just need a friend to watch the gauge.
 

SeventyMach1

Keep it lubed .... keep it straight .... and keep
Mar 30, 2005
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North Carolina
Aug 7, 2006
#3
  • Aug 7, 2006
  • #3



You don't always need another person to do it. I guess it depends on what kind of tester you get. Some will hold the pressure and only release when you hit the button.

Also, some testers come with a remote starter switch to make it easier.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
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Aug 8, 2006
#4
  • Aug 8, 2006
  • #4
And when you do it, do a dry test and then wet - the comparison can be revealing.

Hot motor, pull all plugs, prop throttle Wide open, disable ignition and/or fuel and test away. It can be smart to have a battery charger connected so it keeps cranking strong for equal results.

That's a horridly simple version - when you search you'll find much more detail.

Good luck.
 
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