60 psi on all cylinders

[corbons87ranger]

So I bought a 1987 2.9l V6 Ford ranger XLT from an auction last year and I found it to be a little bitty of a piece of junk before diagnosis. It had a major knock which I had found to be a lofter rod that fell out of place and almost sliding down to the oil pan. After fixing that I did a compression test on all six cylinders and found all of them to be 60 psi. Is this normal or is this an engine ready to be overhauled or take. To the scrap yard?

 

[alwaysFlOoReD]

60 is very low

 

[Uncle Gump]

Depends on how you ran the test?

We're all plugs removed?

Was throttle blocked open?

Did you have a charger on the battery for consistent crank speed?

Fuel system disabled??


60 does seem low... but its consistent.

 

[fastpakr]

Do you trust the compression tester? If you don't know that it's good, borrow another and retest one or two cylinders.

 

[rusty ol ranger]

Do you trust the compression tester? If you don't know that it's good, borrow another and retest one or two cylinders.

Yes.

If you got 60 on all 6 id try a different tester.

90 is required to run.

 

[corbons87ranger]

Yes.

If you got 60 on all 6 id try a different tester.

90 is required to run.

It still runs but when given to much gas by the pedal it just stumbles and chokes

 

[corbons87ranger]

Do you trust the compression tester? If you don't know that it's good, borrow another and retest one or two cylinders.

I will try that thanks

 

[corbons87ranger]

Depends on how you ran the test?

We're all plugs removed?

Was throttle blocked open?

Did you have a charger on the battery for consistent crank speed?

Fuel system disabled??


60 does seem low... but its consistent.

I did a cranking compression test on it. The throttle was not blocked open. I did have a charger on the battery. But the fuel system was not disabled I just disabled the coil.

 

[SenorNoob]

I'm prepping for a swap because I have 5 cylinders at roughly 90. If all six were at 60 I can't see it running. And the throttle being closed will cause that.

 

[rusty ol ranger]

It still runs but when given to much gas by the pedal it just stumbles and chokes

Id get a known good gauge and open the throttle and try again. At 60psi im 99% sure it wouldnt even fire

 

[corbons87ranger]

I'm prepping for a swap because I have 5 cylinders at roughly 90. If all six were at 60 I can't see it running. And the throttle being closed will cause that.

Everything still runs great so I think that the pressure tester I was using wasn't the best.