LovelyIdol

Started a new thread that answers the question rather than having to read through a bunch of people saying "Do a search, its been answered before"


So I had the typical crap happen with my 99 GS300 going into limp mode and only driving it around at 10% throttle like apparently a lot of these cars have an issue with.

I FIXED IT.


Did the typical stuff to research what it was, got the part numbers, used an ohm meter to make sure what it was, THEN called the dealership.

Here is something interesting that I found out, if you go through Lexus to get these parts, you will spend 5-15% more than if you do your research and head to a Toyota dealership with the part numbers. These sensors are the same on three or four different cars, BUT year does matter so do your research.

After I fixed everything, I took the throttle body off and cleaned the hell out of it (if you have this issue, you probably have a lot of carbon in yours as well so clean it)

Its important to make sure battery terminals are unhooked before you mess with it, disconnect the three sensors, switch them out, PLUG THEM IN THEN HOOK THE BATTERY UP! If you dont do this, you can risk shocking the sensor and frying it. Turn the car on, let it run for a minute, if you still have the issue with it being in limp mode, adjust your tps a little bit so the idle is correct, then unhook your battery again for a minute to be safe then hook it up and check to see if it reset the ecu.

I did this on two cars now and it worked perfectly both times. The tps adjustment CAN send it into limp mode, but it probably wont, just start with it in the center of the slottled holes when you begin and it should be okay.


98-2000 Sensor Part Numbers, 2001-2005 have variances do your research!!!
89672-30020 - Throttle Control Motor
22060-46010 - Throttle Lever Assembly
89452-30150 - Throttle Position Sensor


And pictures so you know what they look like:

Throttle Control Motor



Throttle Lever Assembly



TPS

ttaylor993

I want to add my 2 cents worth to your statement about the cost of parts at the Toyota dealership versus a Lexus dealership. I have found that the price to be as much as 100% higher at the Lexus store compared to the Toyota store - for the exact same part. I was changing the cam and crank seals on my GS300. I screwed up both the new cam seals putting them in (trying to take a short cut). I wen to the Toyota store to buy new seals. They only had one in stock. Went to the Lexus store for the other one and had to pay twice as much; $6 at the Toyota store, $12 at the Lexus shop for the exact same part number.

LovelyIdol

better solidity of my point


There needs to be a large "clean up" of the forums, also, there needs to be an increase in people doing research before they ask questions. Hopefully more threads like this one can name out **** with part numbers, directions, etc to help keep the board cleaned up. Obviously I am not talking about all questions or topics, but if something so common as this is to be asked, the answer should be obviously found.

brainsurge

I have a question, since my 01 GS 430 is doing random misfires, and only during warmup. Since the same TPS is installed on the GS (89452-30150), can this part also be cleaned? Also i read about another sensor (APP Sensor), that can be taken apart and resoldered. However, as the tb on the 430 is electronic, there is only the TPS Sensor and Torque Motor on the Throttle Body, the APP Sensor is located in the footwell.
Also there is no CEL!

Didn't want to open a new thread, however i am searching since some time now and couldn't find my issues exaclty. I also replaced some hoses already and the pcv has been replaced 1-2 years ago already...

captainva

iTrader: (1)

I had that problem of a GS400 and removed and reinstalled the coil packs and it fixed itself. It could be a bad connection on a coil as well

brainsurge

I already have replaced the plugs, the coils are now around 1 year old...(aftermarket coils)...i suspected a vacuum leak, but i cant find any more leaks. Today i also had misfires during warm up phase, both during driving and standing stationary. I am not sure if i should replace the maf, but it also happens during idle. i also replaced the water temp sensor...i ordered a used tb for troubleshooting...however, i am not sure which way to go first.

1998gs

brainsurge

I found my fault, since it triggered the cel during high torque condition - fault came multiple times always on cylinder 1, i replaced the coil pack and it didn't came back since then! also a couple of vacuum/pcv lines (and injector lines for lpg) were on the way of becoming brittle.