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Old 01-23-2015, 06:24 PM   #1
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2007 600HP ISX stalled after start, now won't start

A friend has a 2007 CC Magna with the 600HP ISX Cummins engine. He started the MH and the engine ran for a few seconds and shut off. Now it cranks but won't start. He replaced the fuel filters even though they were full of fuel, the check engine light comes on in the dash and the fuel pump makes noise when the key is turned on. The Silverleaf shows a code 94 (low fuel pressure). Has anyone run into this? He has a Cummins tech coming to look at it tomorrow, just trying to give him some ideas before he gets there.
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Old 01-24-2015, 01:34 AM   #2
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Just because the fuel pump is running doesn't mean it's making pressure, right after key on when the pump starts to run you should b able to hear a change in the sound. If you don't either the electric pump went bad or there is a restriction in the supply line from the tank to the pump. I replaced a electric pump on a isx two days ago, pump ran but wouldn't build pressure to start motor.

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Old 01-26-2015, 08:06 AM   #3
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He's found out that it was. The lift pump that went bad and is waiting for the part.
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