every since i fixed my thermostat my idle has been lower. that i dont care. but now when i shift it takes a sec for it to even drop. then it drops very slowly making my car choke before it drops to the geared RPM. i thought it was the clutch cable to tight and it not disengaging all teh way, but i did it so that my cable was the least tightest adn it still happened. whats up?

 

have you checked your throttle body and throttle cable?

 

oh yea the car also backfires every now and then. not like a huge one but loud enough i can hear.

 

is your dizzy cap getting enough air? that ionized air in the cap has been known to cause ignition problems.

 

It sounds like the tps is going out. Backfiring or mising will happen if the TPS is not functioning correctly.

 

Most likely your throttle cable is kinked on something. Or cooler weather could be causeing the throttle body to stick a little bit. The cable or throttle body itself is the only thing i could ever imagine making that happen.give it a try

 

TPS? it is really cold now. i checked the cable and it SEEMED fine. so i should take my intake off and check teh plate thing on the TB?

 

Sounds like a stuck throttle cable/throttle plate.

 

the cable seems fine. and how do i check the throttle plate? it only happens when im above 3k. when it drops below that it just drops down like normal