6.0 running rough, no throttle, no hot start

Discussion in '6.0L PowerStroke Engine & Drivetrain' started by 04gold60, Mar 19, 2019.

  1. bismic1

    bismic1 Full Access Member

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    You can always have a logic board failure in the FICM, and that is what it looks like to me. FICMrepair.com can test it. IIRC it is $75. They are honest and won't sell you on repairs that aren't needed.
     
  2. 04gold60

    04gold60 SDD Junior Member

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    Cool I will look into them, I am gonna go have my batteries, alternator and starter tested, might as well have them all tested with the strain I have put on them

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  3. 04gold60

    04gold60 SDD Junior Member

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    Well I got the batteries and starter and alternator tested, all good, starts fine for having the oil system open, now I put it in drive and I can floor it and it only goes up to 1100 rpms. Got a fuel pressure tester and I am in the process of making an adapter to check that.

    I am leaning towards it being the FICM but I might as well check the fuel pressure and make sure, might get lucky and need to replace all the gaskets on the secondary fuel bowl and fix the problem but I am not holding my breath. I have a feeling I might need to replace the gaskets and still have a FICM issue

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  4. 04gold60

    04gold60 SDD Junior Member

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    So an update now:

    I hooked up a fuel pressure tester and checked my fuel pressure key on engine off and it was about 65 psi and then I had my wife start the truck and it cycled up to 70-75 psi and then it went down to about 55-60. So then I had my wife put the truck in drive and then hold her foot on the brake and press on the gas and she had it all the way to the floor and the pressure dropped to 50 psi and essentially stayed there even back in park and I had her bring it up to 2k rpms and it stayed at 50 psi. So I had her turn it off and then bled the pressure out which had already dropped to about 10 psi almost immediately after turning the key off.

    Went to restart it and turned the key on and the pressure was reading 0. Pump was working, opened the cap on the secondary fuel filter and it would fill with fuel but also bubbled and had bubbles in that line. I feel stumped.

    Also you can hear an air leaking sound coming from the fuel bowl when the pump is running. Wondering if I have two issues, gonna try and replace gaskets on the fuel bowl and the hfcm, thinking about possibly dropping the tank and checking the pickup screen and etc.

    Any other ideas?

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  5. bismic1

    bismic1 Full Access Member

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    Fixing the air in the fuel is the first priority for sure. Sometimes the filter o-rings are the culprit, sometimes it is the WIF plug o-ring, and sometimes the fuel pump itself. Those would be my first choice in troubleshooting. If your fuel level in the tank is above 1/4, then it would be unlikely for the issue to be there IMO.
     

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