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i have some experience with gen4 only, not sure if it applies to gen3 too ... there is an adjustement screw on throttle linkage that allows adjustment of idling speed, but that applies only to non-driving gears (P and N) and computer will take over completely in adjusting the idling speed on any driving gear.
in the end you will have about 1,000rpm while car in Park or Neutral, and still 700 in D,R,2,L at full stop. also such big difference in engine speed will cause harsh gears shifting in parking lot and most likely will kill your engine mounts much quicker (it happened to me). not worth it!
i had asked a friend to do this in past and then forgot, only recently had to revert that "mod" since the effect was bad, long story short the throttle adjustment was causing the throttle plate to stay a little open at idle and it was affecting engine vacuum and causing all sorts of other trouble over time. not a recommended way to go.
as other said, try cleaning TB and IAC with sea foam deep creep and toothbrush. that should fix your idling problem. you might want to replace the spark plugs, wires and filters too as they may affect idling speed as well. checking for vacuum leaks would be also a good idea as this may cause weird things to happen.
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'02 Solara SLE V6 1MZ-FE/A541E Coupe .: Denso/NGK : Akebono SP : Philips 9011 HIR (low+high) : Toshiba HIR2 9012 (fogs) : Magnefine :. @ 131k
'00 Solara SE 5S-FE/A140E Coupe .: NGK : Hawk HPS : Philips XP : RCEng : Magnefine :. @ 82k
4SALE: connectors for Camry Headlight Wiring Harness and ECU
Last edited by fenixus; 03-18-2010 at 11:10 AM.
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idle help and questions
Linear Mode
