What's Wrong?

[AJ'S 88NA]

Isn't there an idle adjust screw on the throttle body? I know some things are different from ge to gte, so I dunno. If there is, try backing it off 1/4 turn or 1/2, but keep track so you can put it back just in case. Last time I had idle issues after warming up it was the TPS and a bad brake booster grommet and check valve. Just a thought

No there isn't a idle screw on the TB. At least one that you're suppost to screw with Idle is controled by the ECU.

 

[D.J. Aranda]

well, i think i figured out what's up with my Supra... The ISC valve might have a significant role in not lett'n my car idle right. Strangely enough, the ISC makes the 'clicking' noise when i turn the engine off, just like it's supposed to. I took it out anyway and bench tested it... turns out that it don't work. i'm gett'n another one 2day, that sould fix it.