Hey guys I just got my car back from the dealership 4/26/02 at 7:00PM they replaced the TPS unit and the car runs like its brand new. No shaking!!!!!!!!!!!!! In fact it was so smooth at idle I had to make sure the engine was on. Now thats how a Lexus should idle! Anyways for all GS owners experiencing rough idle insist on replacing the TPS units. The dealership will not want to do it but absolutely insist on it in writing like I did. They replaced mine under warranty and as a "Goodwill Gesture" use that phrase in the letter and stress to them that you are a loyal customer. The part is only 13 dollars and labor is 50 bucks. So if you cant get them to replace it because they dont want to replace it until it breaks or until the ECU reports problems. The ECU however will not detect a malfunction TPS. My technician even stated that he did not want to replace the TPS unit and said that it was normal for the car to idle rough. I told him just do it and now he is kissing my ***. They have tons of reports of GS ideling rough and could not figure out why so now they are happy mine is fixed so they can start helping others.

By the way the new idling rpm is 600-625 thats a increase of 200 rpms at idle with the gear in drive and no AC. Absolutely no shaking. It makes me want to drive the car again and again to test it. I have a new love for my car again.

I have not tried pulling the #39 fuse like someone suggested if you guys tried that and it fixes the ideling problems to let me know. Mine is working so good I dont want to mess with it. So please post your results for everyone to see. I can sure vouch for the TPS being replaced.

Go to the rough ideling section in the ENGINE forums to get the whole story about this.

Mystry is solved good luck guys.

Tony

 

Tony,

great post, thanks

will

 

thanks for the info

 

13.00 for a Throttle Position Sensor? Is that correct?
They normally go for 100.00 for Lexus's

 

I heard the service rep ask the parts guy if they had one in stock over the phone loud speaker while I was sitting in the office and he said 13 dollars and some change for the part.
That is probably their cost but for us its 100 bucks.

Tony

 

I heard the service rep ask the parts guy if they had one in stock over the phone loud speaker while I was sitting in the office and he said 13 dollars and some change for the part.
That is probably their cost but for us its 100 bucks. Hell even at that cost I would pay for it because the results are worth it. My car is so smooth I cant get over it.

Tony

 

alright, glad to hear your car is fixed...

Aloha

 

Thanks for the info...luckily, my GS idles fine...

 

Tony, Thanks so much for your most informative post!!
That is great info to know. I am going to remember this, and I hope I don't have to use it

Thx again!

 

This is good info, thanks!

 

I wonder if this problem also exists with the GS430 or limited to the GS400 only? My idle is fine with occasional +/- 100rpm ups and downs but no shuddering.

 

Tony, thanks for posting the results here. I will print out your post and put it in the owners manual should the idle get bad on me again (it happened twice already).

Do you mind posting who the dealership is, who your service advisor, the repair order number...any factual information that will help my dealer verify (or will help my CONVINCE my dealer that it's a fact. )

Thanks again.

 

good to know

but my 1st. Gen just idles splendid

yezzzzzzz

 

thanks man


drew

 

Fletcher Jones Lexus in Las Vegas
Service consultant is Amber Vela she did an excellent job and did not argue with me much.
Job #594
RO# 105874
date 4/26/02
part number 8945230140 thats all I got off of the receipt
Hope this helps.
If not see how much it would cost to pay to replace it.
I think its only 100 bucks.