Scenario:

Have an 07' automatic (non-Mrev, has the single throttle body). Installed a JWT Pop charger about a week back. Every time I brake my RPM's will shoot up to 1400 then back down to 1000, as I approach 10 MPH it will surge back up to 1200 RPM's. Once im at a complete stop problem solved, until I stop again.

The car has about 2500 miles so I don't believe its a problem with a dirty throttle body. I reset the ECU last night and still the same problem.

Any suggestions.

Thanks in advance.

 

My best guess would be a faulty throttle body, probably a bad throttle postion sensor or the actuator. This would not be the first one of these I heard of failing on a G35.

Your car is under full warranty, so don't worry too much about it. Take it back to your dealership and have them fix it.

 

maybe retrace your steps? or do what he said^^^
without the pop charger