Trying to help a friend out after HPFP change. Please help!!! - Ford Powerstroke Diesel Forum
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Old 03-23-2014, 10:09 AM
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Trying to help a friend out after HPFP change. Please help!!!

I have been helping a friend with an 09 6.4. Heres a little background. The truck came from another shop that charged this guy 3,000+ in parts and labor and the truck still wouldnt run....lawsuit pending. Now a friend of mine, with lots of ford diesel experiance, is working on the truck. When he first got it we pulled the cab after testing fuel pressure and HPFP was toast. Installed new HPFP put all back together and drove truck for maybe 60 or so miles then the truck died. Got the truck back to the house and tested fuel pressure and only can get 1500 psi while cranking. Thinking we may have smoked the HPFP again we pulled the cab again and put another new pump in. Fuel pressure still at 1500. All filters have been changed tank cleaned out and new lift pump installed. One thing you can hear when you turn the key on it sounds like fuel is just bypassing and going back to the tank as you can hear it bubbling/gurgling in the tank. There are no codes reading at this time. We are stuck and tired of looking at the truck lol. Any help or suggestions would be great!!! Thanks in advance!
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Old 03-25-2014, 04:52 PM
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you need to install the fuel bleed tool in place of the fuel cooler banjo bolt, the bolt that is closest to the cowl. check for air bubbles coming out of the fuel cooler, so the line will need to be clear. If the bubbles never stop, or keep returning, you might have combustion gas in the fuel rail from an injector cup cracked.
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Old 03-25-2014, 05:00 PM
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We did that and still have fuel going through that port and still hear all the fuel returning to the tank. No fuel in water. Nothing. IDK


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Old 03-25-2014, 05:09 PM
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I've seen the FRP sensor go bad, and the little washer at the end of it falls off. I'd pull out the frp sensor from the RH fuel rail, and be carefull when removing it, in case that little washer falls out, you dont want it to drop into the engine.
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Old 03-25-2014, 05:13 PM
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Already changed that out.


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Old 03-25-2014, 05:21 PM
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that gurgling usually mean its sucking air into lp fuel system. sometimes the sender boots fall off and you'll run out of fuel at 1/4 tank, might could add diesel. If u got access to an IDS, you may want to make sure the HP fuel system parameters are reset in toolbox-powertrain-service functions. Do you think its possible you have a gross leak in the HP line somewhere?
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Old 03-25-2014, 05:52 PM
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Tank had been pulled out cleaned and all pick up inspected. We are thinking the line off the fuel cooler check valve may be screwed up so off comes the cab again


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