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Author Topic: compression testing....  (Read 693 times)

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Eighth_dwarf

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compression testing....
« on: 05 April 2010, 15:36:10 »
got my tester, now how do I go about it?

My guess

plenum off, injector rail off, allplugs out pull fuel feed fuse, disconenct LV plug from dis-pack, test each cylinder in turn?

is this the correct way? what results should I be expecting?
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Daily drive     - 1997 2.5 CD Auto - 25-35 mpg
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cem_devecioglu

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Re: compression testing....
« Reply #1 on: 05 April 2010, 15:39:16 »
no need for the injector rail off , disconect fuel pump socket.. under the rear chair.. under the boot carpet..

you need 3-4 cranks for the pressure to build up

this one is nice..
http://www.youtube.com/watch?v=XcmIPm8M3Xw&feature=related
« Last Edit: 05 April 2010, 16:22:35 by cem_devecioglu »
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Kevin Wood

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Re: compression testing....
« Reply #2 on: 05 April 2010, 22:45:46 »
If you disconnect the crank sensor or pull the 30A engine management fuse instead of the fuel pump it also disables the ignition and is kinder to the coil pack because it won't be firing into an open circuit. :y

If the plenum is still on, open the throttle when testing. If not, ensure you remove any rags you placed in the intake manifold!

Kevin

EDIT: But if you remove the LT plug from the coil pack that's OK. :y
« Last Edit: 05 April 2010, 22:46:36 by Kevin_Wood »
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