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Re: 86 international, cummins 855 cid jake brake
Posted to HD/Fleet Forum on 5/30/2004

Jerry,

The Jacobs brake fitted to these engines WILL stall the engine at idle. This is because the throttle microswitch on the PT fuel pump is activated by the throttle lever and will remain closed as long as the pedal is in the idle position. To stop this t... Login to read more.