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buddy57's avatar
buddy57
Explorer
Dec 13, 2014

Engine accelerates when brake pedal is pressed

I have a 2003 37 foot marlin diesel pusher with a Cummins engine. It is on a freight liner frame.On a recent trip, while coming to a stop and pressing the brake my engine started to accelerate . I ha...
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ScottG's avatar
ScottG
Nomad
Dec 13, 2014
A similar thing happens sometimes in Dodge trucks.
It happens when a torque converter is not unlocking. When that happens and the computer senses the eng is dropping below specified RPM's, it adds fuel to the eng to keep the revs up. Since the eng is still mechanically coupled to the trans it tries to accelerate.

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