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At that compression, the motor can probably last another 100,000 - 200,000 mi. However as you put more miles on, the compression will continue to drop further along with the power loss.

As far as power loss, you've probably lost approximately 30 to 40 HP.
 

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A difference of 10 psi would not be noticeable. The FSM states a 14 psi differential limit between cylinders so you're OK.

Are you doing the compression test correctly? While testing a cylinder, make sure the throttle valve is fully open.
 

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Discussion Starter · #5 ·
Compression testing

My mechanic did the test. At first it was 130 across. Then he changed the timing chain and said it was 150/150/150/160.
All I know. I will ask him about the throttle.
 

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i'm not 100% sure, but i think a stretched timing chain can cause a loss in compression. i believe that the chain on my SR is stretched and i couldn't get it to read at all when i tried to test mine. so i could see it helping out in your case.
 
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