I have a 88 rx7 n/a. Everytime I take it to high rpms past 3rd gear then let off the gas it stalls. Then it wont start and the only way I have got it to was by push starting it. And then now when i drive it for awhile it starts to smoke. any ideas?

 

Sounds like you have a failing injector and it is loading the engine up with fuel. Probably one of your secondaries.

Have the injectors serviced at an injection shop.