ok i just got my rx-7 about a couple of weeks ago and its been sitting lil over a yr i got it to start but iwas a very very rough idle and when i rev the enigne it goes up very slowly i put some marvel in it and i didn't to a damn thing.........maybe the on of the rotor housing's are blown????

 

Do a compression test then...

 

it supposed to be around 80 right???

 

90+ is a good reading

 

you really have to know the rpm it's cranking at during the test to be able to say good vs bad.

 

go figure as soon as i get my tester (pepboys is good for something ) it rains