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Compression Test DIY?

logray
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logray Member

logray

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Posted (edited)

Sorry if this is a duplicate post, I couldn't find this info using search.USA '99 996/C2Changing my spark plugs soon and I'll have the mufflers out/etc.While I'm in there if I can get my tool installed I'm going to do a simple compression test.I have a PST2 and an understanding of how to do the test, but am missing one step, in number 5 - can I pull a fuse or is this something the PST2 can handle? I know it can disable an individual cylinder's injector and spark and that is another way to do a quick rough compression test. What I'm not sure of is if there is a way to disable all of the cylinder's injectors at the same time.Taken from here.1. warm up engine2. remove all the spark plugs so the engine will turn easy.3. block open the throttle wide open4. disable the ignition system to prevent sparks (remove the feed wire to the coil).5. disable the fuel injection (pull pump fuse).6. screw the gauge on with the right adapter in the sparkplug holes.7. crank the engine and listen for about 5 compression strokes(the needle will move as this happans).8. After you are dont cranking a set number of times, crank a second time until the needle stops moving.9. Write down the numbers and repeat these steps in all cylinders

Edited by logray

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