BlairC

Interesting behavior from my new GX470. When I come to a complete stop at a light the RPMs fall to idle (~500 RPM). As I hold my foot on the brake they will rise to ~800-1000 RPM before falling back to idle.

This is troublesome because i was adjusting the radio station with normal stopped pressure on the peddle and the GX started to move forward as the RPMs rose. A firmer press on the brake peddle stopped the behavior.

Details:
2006
GX470
64K
CPO

I need to take it into the dealer for a driveline clunk fix, an out of balance tire and this... ugh. I expected better from a CPO car. They are going to fix this thing.

steevr

It's your A/C compressor kicking on and off. The same thing happens to me during the summer if I'm sitting at the light with barely enough pressure on the brake to keep it from creeping. In the colder months, I run the climate control in the Auto position with the A/C off.

mann777

Since you are going to the dealer to sove this, tell them to have the MAF sensor, Idle Control Valve, Throttle Body Control to be checked and cleansed. This will solve the above issues.

BlairC

yeah that is good guidance, i have to travel for work next week so i am going to try and get an appt. on monday to drop off the truck and get a loaner.

BlairC

dropping the truck off tonight to see what kind of resolution i can get. frustrating on a CPO rig.