I just bought a 1989 Mazda Rx7 about 3 months ago...my car has an idoling problem....when the engine gets hot, it starts to surge from 1,000 rpm to 2,000rpm constently...i dont know how to fix it...but other than that the car runs good but i want it to go faster....im not good with the rotary engine and i wanted to buy a turbo for the car but i dont know where exactly to get a good quality turbo...if anybody can help me email me or something...jorb88@yahoo.com

 

A faulty throttle position sensor is a common problem with RX-7 idle rpm surge problems.