[ericwoo]

Originally Posted by Schurkey

What air compressor are you connecting this tool to?

If this is a small compressor that can't maintain 100 psi while the cylinder leaks, the leakdown tester won't function properly, and the indicated leakage will increase over time.

Ok, I just made a post and deleted it because I just tried a 3rd time and realized something must have been done wrong.

This 3rd time, I got the compressor up to its max of around 150 psi, then turned up the max exit pressure but only showed around 120 psi.

I calibrated the gauge to 100 psi as instructions show, then tested and cylinder #1 showed around 8-10%.

I assume that should be good for a healthy engine. Regardless, I am happy to figure this out and get a stabilized pressure reading.

Another thing I realized, that even though the exit pressure was maintained 120 psi on the gauge, my old compressor has an pressure release valve that leaks to turn off the compressor when it is at its max pressure. I taped the valve temporarily to ensure it doesnt leak. Not sure if that was causing my leak down test to not get a stabilized reading or if it is because I turned the exit pressure to max.

I am thinking my engine is healthy and may check the transmission next.

[Schurkey]

Originally Posted by ericwoo

I calibrated the gauge to 100 psi as instructions show, then tested and cylinder #1 showed around 8-10%.

I assume that should be good for a healthy engine.

WHERE is the leakage? My standard--not shared by the entire world--is that ANY leakage past the intake or exhaust valve(s) is unacceptable. ANY leakage into the cooling system is unacceptable. ANY leakage into an adjacent cylinder is unacceptable.

The ONLY acceptable leakage is past the rings, and then only within limits.

And without experience with known-good engines of the same bore size, or a Master Orifice, you have no idea if 8--10 percent leakage is acceptable. You can GUESS that it's acceptable. It is PROBABLY acceptable. But you don't know for sure.

And--as said--you still have seven more cylinders to test.

Originally Posted by ericwoo

Regardless, I am happy to figure this out and get a stabilized pressure reading.

Agreed.

Originally Posted by ericwoo

I am thinking my engine is healthy and may check the transmission next.

A failed torque converter stator one-way clutch could produce poor low-speed performance while not affecting higher-speed performance. But that doesn't really match your symptoms.

I suspect you still have "engine" issues, and you've not answered my questions about ignition timing and fuel mixture that I posted quite a while ago.