OmarGS430

Ok....I just bought a 01' GS 430....Love the car...Besides for expected mainenance I have a problem that is really pi**ing me off! For instance if I'm going around 40.......and try to punch it.....it will lag for a few seconds....and then pick up speed and shoot up rpms....otherwise.....it delays for about 2 seconds and then picks up.... I was told it could be an oxygen sensor or something to do with the MAF....PLEASSSSSE SOMEONE HELP!!

sakataj

iTrader: (182)

its normal, its the lovely DRIVE BY WIRE SYSTEM lexus put in....

OP search next time MANY threads on this

skperformance says this will "fix" it and he seems happy with it

https://www.clublexus.com/forums/gs-...ome-stock.html

shvc1991

Drive-by-wire.... Don't want the lag? Get a GS400.

Also, try turning on the ECT to PWR.

OmarGS430

My check engine light is on and the code is for an oxygen sensor.....someone told me that might take care of it? Any truth to that? Or replacing the MAF sensor?

shvc1991

No need to replace the MAF sensor. Just clean it along with the throttle body. There are countless threads on how to do this. Just do a search.

As for the oxygen sensor, it most likely wouldn't cause the system to lag, but replace that anyway, it could save you some gas.

sakataj

iTrader: (182)

y didnt u mention that in first post BTW? what was the code?

JeffTsai

iTrader: (1)

All of the 2GS are drive by wire. Just that the GS300 and GS400 have the pedal position sensor on the throttle body. The GS430 has that sensor inside the car. It might look like the GS3/GS4 has a manual throttle because of the cable going to the throttle body, but that's just where the accelerator position sensor is located. There's no direct coupling of the throttle cable to the actual butterfly valve.

I think the GS430 they might of just tuned some "softness" or delay into the throttle so people won't be roasting their tires or jumping off the line unexpectedly. It should have maybe like half a sec to 1 sec of delay. If you're having hesitation for 2 secods or more then something is probably wrong.

OmarGS430

I don't know the code.....I went to get the sensor replaced but the guy told me that he had the wrong part and the correct part was the sensor in the back if that helps.....

OmarGS430

And I do appreciate the help.....I just signed up for this forum and I just bought this car and the help means a lot...cause every mechanic I go to won't even look at the car for less than 100!! SO THANK YOU ALL FOR YOUR CONTINUING SUPPORT!!

BossGS4

iTrader: (2)

Re-iterating what others have said ... here's what I did which "livened" up my throttle response on a 140K '01 430

• Clean MAF Sensor
• Clean Throttle Body
• Change Fuel Filter

shvc1991

Would the fuel filter really create such lag?

ThomasGS4

iTrader: (19)

Have you had yours done, Steve?

sakataj

iTrader: (182)

it shouldnt unless really clogged

if not, dont let this guy help you with it.....just kidding parker. when you gonna post up a pic of your internals in this thread

https://www.clublexus.com/forums/gs-...el-filter.html

GS4_Fiend

iTrader: (22)

Drive-by-wire = Electronically Throttle Control System. It's funny how they call it because makes you think it's driven by wire, but in this case, it's electronic.

Drive-by-wire system has a sensor to show if the throttle is at idle or at WOT. That would be the square box that is mounted outside of the throttle's butterfly.

The purpose of the Drive-by-wire is to reduce emissions as the Engineers states it. Some may not believe but that's how it is.


Almost all new cars has Drive-by-wire systems.

JeffTsai

iTrader: (1)

It also simplifies several systems in the car and allows the ECU more control over everything. One such example is that you can eliminate the idle air control valve and the cruise control actuator system/cables. Traction control used to be an extra throttle plate mounted inline in the throttle body as well, and now that is eliminated and intergrated into the single electronic throttle body. It is all controlled via the electronic throttle and done so with much more precision than their outdated multiple system counterparts.