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2003 6.0
runs great but every once in a while it will die due to what seems to be lack of fuel.
I’ve replaced ficm about 2 years ago.
original al fuel pump but added blue spring.
HFCM just replaced.
all new plugs and harnesses.
when it dies, I have pulled the top fuel filter off and verified that I’m not getting fuel pressure, but after 30 minutes or so, I get pressure and the truck will start again. Then it will run anywhere from 2 minutes to 2 weeks.
I have no consistency here and this is getting difficult.
ok so forgive me for sounding like a complete ID10T but I am getting multiple answers...
Does my 2003 6.0 have a pump in the tank AS WELL AS the HFCM? or is the HFCM doing all the work?
again, just installed new HFCM hoping it would fix the problem.
truck ran great all day today (not going anywhere past 1 mile and idling in between) but I have no variable that I can find as to why sometimes it works great and sometimes it doesn't.
could it be related to ignition switch?
background on me: I have been a Network and Security Field Technician for 16 years and my own mechanic since my first 89 Bronco. I know I am good at figuring out problems, but I do tend to overlook the small things occasionally and dig for the wild
Yes, all superduties have a lift pump in the tank.
I'd suggest installing a fuel pressure gauge, either temporarily for diag or permanently. I have one in all my powerstrokes.
I doubt it's key related, but it's hard to say without data.
Yes, all superduties have a lift pump in the tank.
I'd suggest installing a fuel pressure gauge, either temporarily for diag or permanently. I have one in all my powerstrokes.
I doubt it's key related, but it's hard to say without data.
It’s a pickup foot, not a lift pump. Search the forum for this issue, as they often break apart in the tank then plug the feed tubes. I would not change out an HFCM with out dropping the tank and checking the condition of the foot. The tank needs to be cleaned of all debris. Automedic has a great video on YouTube of blowing out all the contaminated lines in an Ex. from the fuel bowl down. It’s a good watch.
Uhm - The 6.0's don't (and never did) have a pump in the tank.
Same for 7.3L.
(edit - 1 min late on the post. Well said @Baylinerchuck .
People use AI (Automated Inexperience, lol) too much now days, and in some searches, AI will state that they have in-tank pumps.
Are there any stored DTCs? The symptoms are what I'd expect for a bad fuel pump relay, which is non-serviceable and potted into the CJB, but can be bypassed and mounted remotely.
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