Never learned how and I kinda regret it.

Now Ive got a compression test set but never tried it. Anyone care to explain how to use it?

Also I can just remove spark plugs with a normal 19mm socket?

Thankis for any help

 

http://www.c-speedracing.com/howto.php

 

I dont really have to pull a fuse do I?

Also wouldnt the pistons be higher and lower in each cylinder so how would the numbers come out the same.

It says crank the car, what does that mean ad how is it done?

Wasnt a great how to

 

Basically you want to disable the fuel and ignition system, thus you need to pull a fuse or two.

You'll want to do the test on a relatively warm motor.

Remove a spark plug, thread the tester adapter in there, hold the throttle wide open and turn the engine over around 5-6 times.

Its easier to have two sets of hands as this will permit you to look at the gauge and take notice of how the pressure builds up per stroke....this is why you turn the engine over 5-6 times as cylinder pressure doesn't build up immediately.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StealthEF &raquo;</TD></TR><TR><TD CLASS="quote">Also wouldnt the pistons be higher and lower in each cylinder so how would the numbers come out the same.</TD></TR></TABLE>

This statement seems to imply that you believe the pistons would not be moving up and down to generate the pressure that you're gonna measure, which is not true. The pistons do move up and down by way of you 'cranking it over'.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StealthEF &raquo;</TD></TR><TR><TD CLASS="quote">... It says crank the car, what does that mean ad how is it done?</TD></TR></TABLE>Hold the gas pedal all the way down to the floor, & turn the key to run the starter motor. Keep the starter running for several seconds, until the pressure quits climbing. I usually have someone in the car doing this, while I watch the gauge.

(The reason you pull fuses is because you don't want the injectors spraying fuel, and you don't want the ignition trying to make a spark.)

 

wow, a lot harder than I thought even myself.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StealthEF &raquo;</TD></TR><TR><TD CLASS="quote">I dont really have to pull a fuse do I?</TD></TR></TABLE>

if you don't pull the fuse you pretty much fill up the cylinder with gas which is a