I have a 1985 Mazda RX7. If I start the car at a cold start my car idiols funny when I let the car heat up. The boges stops. But comes back at 4–8k rpms. Car also hesitate when accelerating. I change my fuel damper. Spark plugs , gas filter, spark plug wires, coils also put brand new air flow sensor still boges. Thinking it may be the (TPS). Any help anyone!!!!!!!!!!!!!

 

boggin while warming up? or after when it is up to temp? or both, is it a random rpm jumping (hint hint show us video)
you can always test your TPS before you part swap it

 

Hi I have video but it’s too long. Car also has rough idle especially at cold start. The colder the worst. Recently every once in a while car sputters like it’s getting too much air or something.