How to do a compression test?

[zZsKyZz]

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 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]

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]

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.