I wouldn't say it's sputtering, but it sounds like it's under load. If I shift to neutral, the car settles backwards like it was straining to move forward, and the motor runs fine. Shift back into D, and the motor sounds rough - rough enough that I can feel it in the steering wheel and hear the difference over the radio at a normal volume. I'm almost 100% sure I have a stepper motor issue as well (binding at tight turns, brake assist workshop that clears with key-off and then back on). Could these two things be related?
Car is an 06 V8 with 100K miles and the TB was done 10K miles ago. No other indicators that something is wrong. Car shifts and drives fine once under way, and the rough motor smooths out the minute we start moving.
Car is an 06 V8 with 100K miles and the TB was done 10K miles ago. No other indicators that something is wrong. Car shifts and drives fine once under way, and the rough motor smooths out the minute we start moving.