EvolvedGS3

Thought I saw a thread awhile ago that talked about calibrating your TB. Now I cant find it.
I was playing around with my OBD2 scantool and logged my TPS. Well for some reason it shows 13.7% at closed and 79.2% at WOT. I checked my cable to ensure it is fully opening the Throttle body, it is. I checked all sensors and adjusted the TPS (All I succeeded in doing was changing my idle).
I am at a loss, if anyone knows what to do to recalibrate the TPS, or remembers where that thread was, I could use the help.


Thanks
B

GSteg

iTrader: (15)

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EvolvedGS3

I saw thats for the 1UZ, will that work for my 2JZ?
I should have specified its a 00 GS3
I did that exactly today with no change.
I wonder if I need a new TPS

GSteg

iTrader: (15)

I doubt it's installation error if it's the original one. Adjusting it should get you in the range you want providing the TPS is working. A new one is about $60 anyways. Along with the door lock actuator, rough idle, etc...you can add failing TPS to the list.

RTIS250

iTrader: (9)

Those numbers are pretty close to spec anyway...

EvolvedGS3

what do you mean?
The at idle numbers are good, but the WOT should always be 100%, what worries me is that when the throttle is full open the ecu thinks its only 79%, which would make for lean conditions with the AFR's

RTIS250

iTrader: (9)

Not true, you will never see anywhere near 100% throttle opening on a scanner. I think the values you are getting are normal. There is nothing wrong with the numbers you are showing.

EvolvedGS3

tell me more.
I see 100% from most ecu's I have tuned. Granted they are not lexus. But I find it hard to believe that they wouldnt allow the ecu to recognize more than 79%.

RTIS250

iTrader: (9)

It baffled me at first too, but its just what ive observed in my years as a Lexus tech. Ive dyno'd and tuned hundreds of GM and Ford vehicles, and they are all different. In most GM products, you can actually see close to, if not exactly 100% TPS. But from what ive seen with Lexus, you wont see much more than what you are getting, and it varies from model to model. I looked up specs in the Toyota/Lexus TIS system, and there really isnt a spec that i could find for your year/model. It gave a spec for pedal position, and it was something like 69-92% is WOT. (those numbers arent accurate, im just recalling numbers). I will check what my car (98 GS400) shows on the Techstream scanner when i get a chance.

JPI Racing

That is about right. When you installing a new TPS your reading should be around 12-13% fully close. Your TPS would never get to 5v, otherwise the ECU will freak out.
JP

JPI Racing

Look at you with the Techstream .
jp

kit cat

iTrader: (6)

does the 2JZ have ETCS-i like the 1JZ? If so, Powerhouse Amuse has a black box that fixes it.

EvolvedGS3

That is pretty interesting to me. I cant see why toyota would have a TPS designed not to hit 5V (100%) TPS value. Does their fuel and ignition maps flatline at around 80%, or is there more room to grow if the TPS would show a higher value?

I would like to see some other members use an OBDII scantool on their car's and post the WOT value.

We use EvoScan to tune the factory mitsubishi Evo 8 and 9 ecu's all the time. Has anyone hacked the factory lexus ECU? Its driving me batty that i have to consider using a piggyback or full standalone when I turbo my GS.

kitsune

iTrader: (1)

Brandon, this is Mike @ Drift Office. I was the one that is interested in buying a GS

It was good to meet you. Hope you get the problem resolved.

Mike

Abear

iTrader: (1)

Ok, Im having some TPS troubles too..although in a 96 GS300, it seems like I may get a better response here.
For some reason, my TPS has been giving me trouble. At first it was throwing a CEL for bad TPS, so I replaced it, then it threw a CEL for closed throttle malfunction. But I readjusted the TPS, and that went away. Now, every now and then, the CEL will turn on and my SAFC2 will read 0% throttle even though Im giving it throttle, and the transmission will jerk into every gear. Also, the CEL will come on randomly also, even if the throttle is reading correctly on the SAFC2.
Anyone have an suggestions? I need to get my codes read, but the guy at work that had the scan tool got fired..lol. Havent had time to make it out to autozone.