Want to do Compression check

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07-01-2007, 02:15 PM

Rage_Kage

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Want to do Compression check

I was wanting to do a compression check and I was wondering what the best way to disable the ignition is?

07-01-2007, 05:46 PM

Trent

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What I would do is pull the two harnesses off of the CAS.

07-01-2007, 05:48 PM

cjernigan

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The cas only has one harness that i know of.

Pull the connectors off the coils and pull the fuel injection fuse in the fusebox. Hold the throttle to the floor.

07-01-2007, 10:17 PM

Braineack

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I just pull the wires for the injector harness and coils.

07-02-2007, 09:25 AM

Uncle Arthur

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unplug the cas

07-04-2007, 09:00 PM

Fergus

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Can somebody please explain to me what the heck is goin on here ?
I thought that you'd need some type of measuring equipment to do a compression check ?

07-04-2007, 10:07 PM

reddroptop

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Quote:

Originally Posted by Fergus

Can somebody please explain to me what the heck is goin on here ?
I thought that you'd need some type of measuring equipment to do a compression check ?

Yes, A compression tester. However to use the compression tester you need to crank the engine, you don't want fuel and spark when you are cranking it just to test compression.

Everyone above is describing ways to cut fuel and spark.

07-04-2007, 10:24 PM

Braineack

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Quote:

Originally Posted by Fergus

Can somebody please explain to me what the heck is goin on here ?
I thought that you'd need some type of measuring equipment to do a compression check ?

yeah it's a pressure gauge, thats about it.

you stick it in the spark plug hole and you crank the engine...this measures how much compression you are making in each cylinder.

07-05-2007, 04:42 PM

Fergus

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Ah cool.
Thanks for that 8)

07-05-2007, 04:47 PM

#10

jayc72

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Pull the fuel injection relay and crank away.

07-05-2007, 04:54 PM

#11

lazzer408

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Quote:

Originally Posted by Uncle Arthur

unplug the cas

Correct.

07-05-2007, 04:55 PM

#12

lazzer408

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Quote:

Originally Posted by jayc72

Pull the fuel injection relay and crank away.

Incorrect. Not with a wasted spark ignition system unless you ground the plug wire you removed. If you don't you have 30,000volts that has to go somewhere and it can ark inside the coil internally and blow an ignitor.