Vehicle idle would rise and drop, sometimes would stall out. Very rough idle; worse with A/C running. Dealer cleaned throttle-body and intake manifold AND charged approx. $100 to install "driveability upgrade" to engine control software. The throttle-body fuel injection system is obviously sub-standard if it needed all this cleaning, and the software patch, (disguised as an upgrade), should have been free.
Vehicle idle would rise and drop, sometimes would stall out. Very rough idle; worse with A/C running. Dealer cleaned throttle-body and intake manifold AND charged approx. $100 to install "driveability upgrade" to engine control software. The throttle-body fuel injection system is obviously sub-standard if it needed all this cleaning, and the software patch, (disguised as an upgrade), should have been free.
- Don V., Roswell, GA, US