running on one rotor? help plz
 

i lost acceleration in my 1987 rx7 13b. i did a compression test and one rotor has no compression and the other is fine. what could be the problem in the engine to lose compression in one rotor?? need your help thx

Sounds like you will need a rebuild or different engine. Internal seals are likely shot.

Yep, you popped an internal (probably apex) seal. Rebuilding is the only way to fix it.