Compression test
Senior Member
Joined: Jan 2012
Posts: 952
Likes: 4
Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
The important thing is consistency. What was your high and low?
With all plugs removed and throttle blocked open and with a GOOD battery you should see 120-150 pounds.
With your high mileage your readings seem to be normal. Why are you asking? What symptoms are you having?
With all plugs removed and throttle blocked open and with a GOOD battery you should see 120-150 pounds.
With your high mileage your readings seem to be normal. Why are you asking? What symptoms are you having?
CF Veteran
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
With 258k on the clock, I would say you're doing pretty good. As long as the oil pressure is still good and the engine runs good, you have another 100k in the engine.
Senior Member
Joined: Jan 2012
Posts: 952
Likes: 4
Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
+++1 
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