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Originally Posted by xnsf
so what's it supposed to do?
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Not so sure why it's so hard to understand why-as was mentioned by someone else, it can be used as a saftey feature to kill the engine. A while back, the throttle cable became stuck on my E30 M3 during a downshift-the revs shot up to over 7k RPM and the engine was bouncing off the rev limiter. I immediately killed the engine by turning the key to the off position.