omegagavin

been instances of 2k models doing this as well?

Fisher503

2001 GS 430 Had that problem too. With AC off I have had as 400-450. How about you?

omegagavin

Oh yeah. My 2000 GS400 does the same thing. What a joke that Lexus cannot or will not address this issue. My service rep was fully aware of this and said that Lexus doesn't consider it a problem.. It's nice to have a $50k car that idles like a Chevy Chevette at a stoplight.

HotBlue400

Just adjust the throttle cable. Lexus puts too much slack in it.. taking out that slack helps alot..

omegagavin

Thanks for the suggestion.

Fisher503

On drive by wire 2001 and up I was told there is no cable to adjust all electronic.

GS430 GUY

That is correct, there is no throttle cable.

SeattleGS400

iTrader: (1)

I could very well be mistaken, since I have a '99 GS400, but I think while it's an electronic throttle system, the acclerator pedal is still connected via wire to the throttle body. At the throttle body is where the electronic sensory starts (i.e. digital throttle position sensor), so you can tighten up the throttle cable a bit (to get a very slight pull on the throttle position to raise the idle speed about 50-100 rpms higher at idle to prevent it from doing its "rough idle dance" with the A/C off and in drive while at a full stop. Do NOT adjust the idle any higher than necessary or it'll lurch everytime you take off at a stoplight.

NYBlkLex

Hey Seattle can you explain "lurch" would the take be something like having
a performance torque converter?

bitkahuna

iTrader: (20)

omegagavin - I have a 2000 GS400. Rough idle / cut out happened once on my car on a hot day with AC off when I came to a stop. I cleaned the throttle body which a friend said might be the problem. No problems since. I recommend you do this.

I think the reason it happens on 98 and 99s more than 2000s is because they generally have more miles and dirt in the throttle body.

omegagavin

Thanks Bit. I'll give that a try.

Fisher503

I dont think it has anything to do with dirt my car has been doing it since the begining. The dealer changed my:throtle body, trottle position sensor and a hole bunch of ofthe ****** and no help.