lexusinred

Car tops out at 4k won't shift or nothing.this only happens at full throttle.
Gs300 is stock thanks any pointers will be appreciated

Mcon

iTrader: (1)

Maybe is your MAF Sensor that go bad or damage. Also, one of the 3 sensors in the Throttle Body. (TPS Sensor). Level Sensor, Control Sensor or Position Sensor.
Check this link:
http://www.lexussouthatlantaparts.co...wd=&origin=pla

lexusinred

Thanks man I know it's not the maf swapped it with my girlfriends one same thing but I'll check out the throttle body sensors. I am having CEL but those r for o2 sensors idk if the readings would throw the car into limp mode unsure

kamlung

iTrader: (8)

here is a dumb question... but are you trying to rev the car while in park??? or you can't go past 4k rpm in Drive?

GSTim

iTrader: (1)

Id recommend you scan your CEL again. Something should be there other than O2 sensors.

lexusinred

Can't pass 4k in drive

lexusinred

Okay I'll rescan see if any different codes pop up thank you

Gdwrench35

I second this notion. Too many possibilities to guess.

sam12345

iTrader: (1)

Clogged catalytic converter

shakky

did you ever find the problem??

JaySco

They haven’t even been on the forum for 6 yrs