Compression Test Results

[Baddog]

I have 172k miles on my EJ22.

Cylinder 1 - 165
Cylinder 2 - 150-155
Cylinder 3 - 90
Cylinder 4 - 150-155.

After a few times of taking it out and putting it back in on Cylinder 3 it got to 150. Not sure whats going on

Tested my friends 97 OBS he put 180 across all cylinders but even tonight heading to a meet I still pulled on him.

Why is this? The engine runs strong. I don't feel like I am putting out low compression in any cylinder.

I do have a noise when the engine de-revs from around 1100RPM's to idle. Not sure if this has anything to do with it.

Heard it could possibly be exhaust valves. I am hoping autozone rents out Leak Down testers otherwise I will be looking into buying one.

I posted this on Legacygt.com came here to get other opinions on possibility's.

[chromehorn]

I pretty much have the exact same problem. Can't remember the numbers off the top of my head. Mine sputters though, at idle. However, drives absolutely fine. Plan to swap in a lightly modded franken motor. Hopefully you do not need/want to take such drastic measures. Honestly, I'm just using it as an excuse to put in a motor with cams and a few other bolt ons.

[Baddog]

My idle is smooth. My power is still there and is unchanged. I really would have never known anything was wrong with the engine. I was already planning on doing cams and LW pulley along with IM spacers soon.

But that may have to all get put to the side to figure this out.

[ericem]

Try and seafoam your engine oil, pour some in the pcv with the engine running, and redo the test. Valves might be a bit gummy.

[Baddog]

Try and seafoam your engine oil, pour some in the pcv with the engine running, and redo the test. Valves might be a bit gummy.

Did this about 5 days ago now. My second time doing it.