Okay guys I understand how old my truck is, I need someone to point me in the right direction. It is a 2004 f350 6.0 a little over 300,000 miles. I installed a blue spring about a month ago. Seemed to be doing fine. Then it would just shut off while driving down the road or idling. Happened a few times so I took it to a shop a guy had it hooked to his computer and it didn’t have any codes so nothing was done. Then while driving home this Monday I was at a traffic light and it shut off on my while at an idle. Had a friend I work with come with a fancy computer and he said it was the hfcm. So I bought one and installed it today. Fuel pump comes on but I couldn’t get it primed. Opened the filter on top and turned the key over but fuel wouldn’t come out. I put the filter in and pushed down still no fuel coming out. Idk what to do. I’m not the best mechanic honestly and learn a lot from YouTube. I am knowledgeable about tools and what not but not necessarily engines or diesel engines at that. Do you think I installed the blue spring improperly, if so would that have caused my issues. I ran out of daylight today or I would have taken the truck apart and checked. No fuel leaks or anything of that nature. A friend suggested I tried to prime the hfcm by taking the bigger fuel line off of the hfcm and trying to squirt diesel fuel inside it. When I took the fuel line off no fuel came out. The gauge has been correct since owning the truck and reads just above 1/4 tank. I would think this would be enough fuel to prime the fuel pump, any ideas I would be so thankful if anyone has any suggestions or thoughts on what it could be…

 

Fill a bucket w/ diesel and run a hose from the bucket to the suction port of the HFCM and see if the fuel pump will work that way.

 

The 1/4 tank no fuel problem happens quite often; it is usually a situation where the foot assembly in the tank comes apart. You can double-check by adding more fuel, and if that solves it, you'll be pulling down the tank soon. And then it wasn't the HFCM.

I've got a video about dealing with the tank.

 

thank you for responding! I will try this tomorrow so just to be clear connect the hose to the lower port on the backside of the hfcm?

 

Bottom line on tank side of HFCM - fuel from the tank to the pump. 3/8" fuel line disconnect tool (OR you should be able to just pinch the tabs on each side with your fingers, or a screwdriver, to release the line! This is for the low pressure tank side).

 

one more question if it does pick up the fuel I’m guessing it will prime it and I’ll be good to go?

 

Diagram below:

 

Follow the priming procedure from the owners manual. This involves a series of key on and key off cycles (without cranking).

For a visual check of flow, have the secondary fuel filter open and filter out. Have two people for this procedure. One watching the fuel filter bowl under the hood, and the other operating the key to the on position.

OR you can just add fuel to the tank to about half full as Jack suggested.

 

 

Yesterday I did as instructed above with no luck even went and changed fuel pumps. Can not get the fuel pump to pump fuel. I can hear it cycle on and off. I took the hose and blew fuel into the tank to ensure nothing was blocking the fuel from getting to the motor. I could hear fuel bubbling in the tank. Hooked everything back up and still couldn’t get fuel to the top filter. I installed a blue spring about a month prior to this happening. Is it possible that I did something wrong? There are no visible leaks and the blue spring is after the filter so I wouldn’t think so. I’m at a loss and been without my truck for a whole week.

 

Did you watch the video (above) Jack posted above on the regulator? Pretty sure he added that so you could ALSO sanity check your "blue spring" work. You could also have a problem w/ the secondary fuel filter standpipe (see below).

Also, are you using OEM filters (and they need to be undamaged)? The fuel pump will not pump without filters properly installed and some aftermarket filters can also cause problems as I recall. The secondary fuel filter pushes a valve part in the center stem to open it and allow fuel into the heads. Also, as I understand it (poor memory kicking in), fuel will not flow into the fuel pump if the primary fuel filter is not in place to push in on a spring loaded pump suction "valve" which exposes the intake ports when compressed.

Hopefully you don't have foreign particles plugging up an HFCM internal passageway (often times the foreign particles are plastic from a failed fuel tank pickup foot/screen). Not even sure if this is possible though. Since the filter is on the pump suction side, no significant contamination should get into the pump discharge line.

 

Yes, the filters are from Motorcraft.
the top one did look a little compromised I held down the deal on top while the key was on and still no fuel.

 

You should get fuel TO the secondary fuel filter without having to hold down the standpipe. Having the filter removed just restricts the flow going forward to the heads.

Since you have a new unrestricted suction system (hose and bucket), and no fuel seems to get out of the HFCM, then it seems to be an HFCM/pump issue.

 

understood, I only removed it to see if I was getting fuel up top.

 

Ok guys I checked for voltage at the harness and I have 12 volts then I ran a jumper wire to the harness with a quick splice. No amperage. Now what? Is it the fuse relay inside the fuse panel or???…