Quote:
Originally Posted by dwtaylorpdx
The new 3 series does exactly this, it does have an Emergency throttle plate that slams to stop runaway if needed.
I also wondered if gasoline was the only option?
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Yes, BMWs with Valvetronic are gasoline-only. The throttle plate is not there to prevent runaway (the ECU would shut off fuel instead), but for emission functions & vacuum during warm-up and for limp-home control if Valvetronic has a failure.