5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

compression test

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Old 11-10-2006, 12:28 AM
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smbikes
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Default compression test

how do u do a compression test?
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Old 11-10-2006, 12:30 AM
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Default RE: compression test

the real question is how don't you do a compression test
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Old 11-10-2006, 12:32 AM
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Default RE: compression test

http://www.dsmgrrrl.com/FAQs/compression.htm
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Old 11-10-2006, 12:34 AM
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thx man
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Old 11-10-2006, 12:36 AM
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Anytime!
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Old 11-10-2006, 12:37 AM
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Default RE: compression test

so u take all the plugs out?
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Old 11-10-2006, 12:37 AM
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ORIGINAL: smbikes

so u take all the plugs out?
You can do it either way.
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Old 11-10-2006, 12:42 AM
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Default RE: compression test

sorry , but im trying to translate , un hook the coil wire , pull 1 plug at a time , hold the gas WOT?
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Old 11-10-2006, 12:43 AM
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Default RE: compression test

No, just crank it about 7 revolutions. Everything else you asked, yes.
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Old 11-10-2006, 12:47 AM
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Default RE: compression test

Disable the ignition module or coil.
Insert the compression tester into one cylinder spark plug hole at a time.
Hold the throttle to full open position to ensure the engine gets adequate air intake.
Crank the engine continually for at least five to 10 full revolutions to obtain an accurate reading on the compression tester.



So thats it
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