Hi guys, i have a 2008 prostar isx cummins that's shutting off while going down the road. It starts back up right away but shuts off as soon as i press down on the pedal. Eventually if i keep trying to keep driving it ill shut off and if i take it out of gear it ill shut off completely. Seems like it’s running out of diesel because after i stop i can hear the electric pump running and after electric pump stop i can restart the truck. To be able to keep driving i have to just touch the gas pedal just very little, if i press the gas pedal hard it stalls.
Prostar shut off while going down the road
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Magicautocenter, Jun 2, 2019.
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Have you changed fuel filters latelety or checked fuel pressure?
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Change fuel filters already. How do I check fuel pressure. Thanks
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I would start with checking for air in fuel. Sounds like it sucking air to me.
spsauerland Thanks this. -
Ill check the fuel lines..thanks
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If fuel all checks, I have had the ECM die on three CM871 ISX with same symptoms. Had one make it back 400 miles with a bag of ice on it!
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Can I check fuel pressure at the fuel filter housing between the fuel tank and the prime pump? Or after the mechanical pump.
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Check it after the pump to be sure the pump is working.
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Ok thanks ill do that
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That electric pump only comes on at key on. I would say your ecm is losing ignition or battery power.
spsauerland Thanks this.
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