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Old 12-17-2018, 10:12 AM   #15
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Bad grid heater or slight air leak in the fuel line so it's losing it's prime.

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Old 12-17-2018, 11:46 AM   #16
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Originally Posted by 3rd stage View Post
My experience with the same symptoms turned out to be a leaking fuel fitting at the input to the lift pump. Somehow the rt angle hose fitting into the FP had rotated just enough to cause a tiny leak. No fuel on the ground under the coach, but it was apparently a big enough leak to allow air into the line which caused the fuel to drain back towards the tank. Had to crank for a while before the engine would fire up, hot or cold.
Air intrusion is almost always on the suction side of a pump so this makes a lot of sense as a probably cause. One way to tell is if someone watches the exhaust pipe it should smoke a bit if it is getting fuel with the multiple tries.

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