lex430

Hi all,

I was out on a test driver at a Lexus dealer, and I was told that the VVTI (Variable Valve Timing with Intelligence) engine is capable of learning your driving abilities. So, every time a new driver gets into the car, the car will learn his/her driving habits for 15-20 min, then it will remember.

My question is, I have noticed that since I had my new GS430 for ~2 months and 2k miles later, the car does not accelerate as quick as when I first got the car? So, if i just drive it hard for 15-20 min, then it will remember the more aggresive habit and become quicker? Or as I see on some of the other forums, people are disconnecting their batteries to reset some ECU, is that the way to go?

But, if the engine is capable of "learning", then why need to disconnect the battery? Any suggestions or opinions would be great!

thanks all,

bitkahuna

iTrader: (20)

It could seem slower because:

a) you're used to the speed
b) maybe the car really has learned
c) u drive like an old fart

disc108

the car DOES learn after a while and the launches start to suck. fixes:

1) unhook the negative on your battery for 15-30 min.
2) take out the ECU fuse. dont know which one it is though.

ceoart

Sounds like your car was trying to tell you slow down you drive to fast. Better get that whip out for those horses or make sure the performance sport mod is on.

BananaGS

not sure about lexus,
in the nissan maxima, the ECU take 5 sample of your rpm/air/fuel/throtle...etc in every 100 miles (or 50, I forgot the exact number) base on those 5 samples to calculate the fuel curve for that car.
this process is repeating over and over, so 2 cars with identical engine may not put out the same about of power....

I am sure Lexus has something similar to this...

gs4power

Actually, the ECT ECU performs the driver adaptive learning, not the VVT-i.