We have a 4600, and have had this problem happen before.
The fuel shut-off will sometimes stick on the back of the injection pump. I believe there are 2 10mm bolts that hold it in. You need to take it off and clean the rod, and inside of the shut off solenoid with a small round wire brush (like one from a gun cleaning kit) and lube with di-electric grease.
The fuel shut-off will sometimes stick on the back of the injection pump. I believe there are 2 10mm bolts that hold it in. You need to take it off and clean the rod, and inside of the shut off solenoid with a small round wire brush (like one from a gun cleaning kit) and lube with di-electric grease.