rx7 with idle problems

[DJTenuto]

i am looking into buying a 1990 gxl. when at idle the rpms jump bak n forth from 1500 to 2000. i was wondering what other would look to first to find the problem. i was thinking it could b the o2 sensor being covered partially a clogged or a bad tps. anyone have any advice at all let me kno or if u have experienced this problem and fixed it or know of some1 who has.

[drftk1d]

what was the wather like outside? Did the problem go away once the car was driven for a bit before returning to idle?

[DJTenuto]

yea it was kinda cold and it went away when the car was driven for like 15 minutes

[DJTenuto]

what effect does the weather have anyways?

[WRC85]

My car has idled high every time it's started when it's cold or hasn't been started for a while, but it usually lasts less than two minutes at most. Is this a common problem, or just a quirk?

[D3rELiC]

its not a problem. its made that way