Cylinder compression for Ford Explorer 4.0L 1991 ?

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  #1  
Old 08-29-07, 06:06 PM
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Question Cylinder compression for Ford Explorer 4.0L 1991 ?

Hello:

I have a old 1991 Ford Explorer with motor 6V 4.0L

The motor have 2 cylinder with no combustion ..

I install new spark plugs and run the motor for 2 hour ,,

then I check the spark plugs and that 2 cyilinder shows the spark plugs very clean..

The others ones are dirty ..

I think I have problems with the fuel injector system ..

Any suggestion ???

I want to know the tipical cylinder compression (lbs.) for a used Motor of Explorer 1991 . ( the motor was rebuilded 6 years ago ) (4.0L)

Thanks in advance
 
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Old 08-29-07, 06:28 PM
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I believe it is 175psi and all cylinders should be with 10% of each other.
 
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