Possible Side Seal Issue
 

I was driving down the highway, pulled in to get gas and the car was idling like crap. It also had a very deep in tone and then shut off because it could not hold idle. I towed it back to my house and now the car will not start….. It turns over and sounds like it wants to start but will not. I pulled the plugs (lots of carbon on them) and did a compression test with a piston tester. The front is fine with 3 even pulses. The rear is getting 2 even then one weak which would make me think there is an issue with the side seal possibly? Before this the car ran extremely strong, though at one point and time it did start up and sound very deep like it was running on one rotor. I changed the plugs and wires at that time and it was fine. The plugs that I pulled this time that were all carbed had maybe 5K miles on them and the wires about 10K.
From everything I have read it seems to look like an issue with the side seal. Is there any way to determine if it's a stuck seal or broken without pulling the engine for a rebuild?

Pour some ATF in the engine and let it sit for a couple days. PM me if that doesn't work and I'll give you some other things to try.

I was reading that ATF is not seal friendly or did I misread this? I shot in some seafoam into the plugs as I read some posts were the second gen guys did it. The car has been sitting the last couple of days with this in it and I was going to pull the plugs tomorrow and crank it to dry it out, then try to start it Saturday. I also saw about MMO. I will attempt ATF if the seafoam doesn't work. Thanks for the input.

ATF wreaks havoc on the oil control ring rubber seals.