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| Message: | 2006 M Roadster. Running steady at 5000 rpm in third gear, back off throttle JUST enough to have the very slightest first bit of engine-brake backpressure. Revs slow to 4.5K or 4K, then the motor and CAR jerk and release, jerk and release about twice per second. It is NOT a physical bounce loop between my foot on the gas and the car's motion -- it is just the motor, hunting for "off" and "on" the throttle. Anyone have this before? I imagine it would do it in other gears ... I'm concerned. Jonny | ||||