My 86 rx7 has this popping sound coming from the exhaust after warm up. When im on a red light idleing , i can hear it pop. Does anyone else have this problem? What can it be and how to fix it? I changed spark plugs but havent change wires. Is my motor going bad?

 

If I had to guess i would say adjust your timing.

 

And make sure the TPS is set properly. The Green/Red wire should have 1 volt w/key to on and the engine as hot as possible (which means drive the car for twenty minutes then check the voltage on the G/R wire).

 

Whats makeing the car wanting to make that popping sound eveytime?

 

Could be unburnt fuel igniting while in the exhaust system.

 

yeah, but its when hes at a red light and idling. my car would backfire a little when i would have my foot heavy on the pedal then let off.

 

TPS and timing cause many different problems. My TII was so advanced it would almost kill itself at idle.