i have a second generation and it has a problem that's really bothering me.

when i get up in the morning and switch the car on to go to work,, it starts shifts and drives normally,, but after half an hour or so when i get into traffic ,, when the gear changes from 1st to 2nd the car bounces and becomes heavy on acceleration ,, but when i kick down the gas pedal this doesn't happen at all.

the second problem is when i want to park ..

here is the situation,,

when i want to park and i put the CAR IN R (REVERSE) and reverse then i put it back into D (DRIVE) the car jerks and shuts off!

this is what comes up in the dash



i have had it diagnosed and there are no codes!

please help me figure out the problem because its really annoying

 

something for sure isn't right about that. Who diagnosed the car ?

 

3 shops diagnosed the car .. and every time there are no codes!!

 

Have you been able to reproduce the problem with a tech ?

 

i went to a tech .. and he told me that i need to change the ecu !! but the problem is that he's not 100% sure

 

My recommendation is take it into a real tech that know our cars. Your local Lexus dealership will charge you a diagnostic fee but a least you will know what's wrong with it. The reason you're not getting a code because it's not an electrical problem it's mechanical mechanicals don't always put up codes. To me and I'm no expert from what you have explained it sounds like it might be problems with you transmission or a solenoid. Good luck and let us know what Lexus says.

 

may be carbon built up related??

 

how can i be sure if its carbon build up ??

 

I thought about this but when it happened to me it threw a code

 

For your problem, I think you should see Lexus dealership, at least let them diagnose the problem. They are best with our cars.

 

Totally agree.

 

try disconnecting the battery for 15 min.

 

Random question but what grade of gas are you running?

 

Sounds like a MAF sensor problem, you either need to clean it or replace it.

Also, as stated in a previous post, have you tried disconnecting the the battery for 15 minutes to see if that helped?

 

This is not a carbon issue. Sounds like the transmission could be having issues. Unplug the battery for 15-30 min. Let the system reset. Turn on ECT PWR to see if anything changes. Do you have an AWD IS? You should have this checked by a competent Lexus mechanic.