I just purchased another RX7, an 88 TII this time. Roughly 5k on engine and turbo, taken good care of. One problem I have noticed is that when the engine is cold, upon starting up it will idle extremely low (to the point of stalling.) To combat this I give it a little throttle until the engine warms up and it is fine. I dont think the idle adjustment screw is the answer because once it gets warmed up it idles great at 750, although every once in a while it will bounce up to 1000-1200 rpm then back down to 750, usually 3 times in quick succession (but I guess I'll save that one for another post.)
Any ideas what could be causing this, or how to fix it would be great.

 

mine does the same thing after i put my turbo II engine. but mine doesnt bunce because i adjusted the TPS. but it doesnt idle all that great when cold but once warm up, actually when the oil warm up it idle fine

 

no ideas anyone?

 

vac leak, tps, cold start cam, bac

 

Adjusted the TPS, 1k ohm closed, 5k ohm at wide open throttle. still no solution. im going to clean and test the bac next.