RUSSOM

iTrader: (4)

You've got that right. Went out there a little while ago and fired it up and let it get to oper. temp. so I could adjust the tps and I thought, hmmm, doesn't sound high so when I looked in to confirm that it was up to water temp I looked at the tach and its right within spec 700-750 in P. Got in it, put it in D and it fell to about 500 rpm. Perfect, right within spec again. Shut it off and cranked it again and perfect again. So it fixed itself...again. So except for it being entirely cable operated, it has no warning lights, perfect idle, and perfect drivability. BUT, its still cable driven.

I'm thinking that I'll probably be looking at a new APPS and TPS here before too long.

qgoat

Sorry Russom, My reply is was intended for the op. I have never experienced the problem you described but I hope it works for you anyway. GOOD LUCK!

GS300-2002

is this also true for 02 GS3
i knew it was drive by wire but i thought the cable was still used to operate the throttle body

ivnnln

iTrader: (1)

Percy, can you take a snapshot of the sensors's location so that I can reference to mine too, pls? I have to same yr as yours. Mine is problably doing the samething like yours, and maybe I just don't notice it. Thanks.

RUSSOM

iTrader: (4)

What year and model and I can probably post or e-mail you a schematic.

UncleRay

iTrader: (2)

Did you make sure to place the butterfly switch back to regular position where the Throttle body is placed?



It's the big Circle in the middle. Jeff, if you're reading, please fill in at what degree it should be open/closed at.




EDIT:

Did you also change your gasket for the MAF sensor and the Throttle body? If not, you probably should since you have that many miles.

RUSSOM

iTrader: (4)

If anyone cares, my update is this.

I bought a new apps and tps from Lexus and set out to install them this afternoon. I started with the apps. I r&r'd it, cranked the car and it revved and idled at about 2k rpm and was still cable only activated so I checked accel voltage at .54 (within range) and went back under the hood to see what was up. I didn't see anything that stood out so I disconnected the battery and grabbed the old one again and reinstalled it so I would know if maybe I just didn't clock the new one correctly, well, I re-installed it just like I did the new one and the old one showed .58, again perfectly within range, and when I cranked the car it ran just like it did prior to the service, iow, not perfect, but close to it. I started to do the tps and then said the heck with it and got a beer instead.

The only way someone would know something isn't quite right is that when it starts up cold it flares to 2k rpm then falls to about 1500 gradually settling into a 750-1k rpm idle and then about 400-500 rpm in gear...and cable operated. Still no warning lights.

Does this sound familiar to anyone?

UncleRay

iTrader: (2)

Sounds farmiliar to me. With the new TPS, you have to set it at a certain voltage which requires a specific machine to do so. The machine is read from the OBDII reader, which marks what the voltage is reading. I believe the voltage was 11v for the engine off, and 14v when the car starts. It also has to be in at a certain angle as well. If you set it one degree higher than it should be, you'll get very bad cranking, and very bad revving.

I learned the hard way

Rock-a-Lex

iTrader: (4)

After cleaning my TB I experienced the EXACT same thing. I did nothing to the car...about 4 days later it corrected itself and idel has remained on point since. Give it some more time. Trust me.

sillyman

my car is basically driving on its own with the high idle... 2000 in park 1100 in gear??

GS4_Fiend

iTrader: (22)

Could be idle air control valve, tps, or even carbon build up around the butterfly