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I don't have any ideas short of checking for lift pump fuel pressure (Scan tool) and scanning for codes. Lift pump pressure should be ~78-85 psi.
I do want to point out though, that truck is indeed turning over. Its the very definitiion of turning over, the engine is spinning. Its just not firing.
I don't have any ideas short of checking for lift pump fuel pressure (Scan tool) and scanning for codes. Lift pump pressure should be ~78-85 psi.
I do want to point out though, that truck is indeed turning over. Its the very definitiion of turning over, the engine is spinning. Its just not firing.
What’s strange is this morning on a whim I decided to see if it’d crank, and it started right up like nothing happened…
All I did this morning was open the fuel cap to see if it was pressurized.
Had a wrench icon come up after starting it. After that, I shut it off, turned it over again and started right up again.
I’m assuming it may have been a fuel hiccup? So I went ahead and grabbed a fuel filter kit.
Key on, Key off (without attempting a start) at least 6 times to purge air.
Be advised that the frame mounted filter has to be correctly tightened down to the stops. Put oil on the o-ring of the cap.
check that lower filter over good for any metal particles.
10-4. that’s what I was planning on doing! Don’t really know when the last time it got a fuel filter change so probably due for one. I managed to get the under the cab filter, but not the rail filter since I managed to forget that. Oops.
Also put oil on the threads of the cap of the lower filter, known as the DFCM (diesel fuel conditioning module), not just the new O-ring. That's what i do and it makes the cap turn on like butter. I got that tip here from a Ford Tech. The stops are located to the rear of the pump, where it mounts to the frame. They can be broken off so be careful when the cap gets close to the top. I take a flashlight and shine it up towards the stops so I can see when they meet.
Also, the factory manual calls for 6 priming cycles but I do at least double that... But I'm overkill...
Almost forgot to mention, unscrew the cap 3 times before you open the drain plug, to break the suction, or else there will still be pressure in the system and it won't stop draining.
Last edited by Overkill2; Apr 27, 2024 at 06:33 PM.
Reason: Add to post
Also put oil on the threads of the cap of the lower filter, known as the DFCM (diesel fuel conditioning module), not just the new O-ring. That's what i do and it makes the cap turn on like butter. I got that tip here from a Ford Tech. The stops are located to the rear of the pump, where it mounts to the frame. They can be broken off so be careful when the cap gets close to the top. I take a flashlight and shine it up towards the stops so I can see when they meet.
Also, the factory manual calls for 6 priming cycles but I do at least double that... But I'm overkill...
Almost forgot to mention, unscrew the cap 3 times before you open the drain plug, to break the suction, or else there will still be pressure in the system and it won't stop draining.
You know, I had the oil busted out already to put on the seal, and thought why not put some on the threads too. Glad I thought of it, because you’re right, made it turn a lot easier than I remembered!
I unfortunately didn’t think to unscrew it a couple times. Diesel dumped all over me the first time… whoops…
I probably primed 12-13 times just to be safe.
I’d say it was probably about time for it to be changed anywho!
You know, I had the oil busted out already to put on the seal, and thought why not put some on the threads too. Glad I thought of it, because you’re right, made it turn a lot easier than I remembered!
I unfortunately didn’t think to unscrew it a couple times. Diesel dumped all over me the first time… whoops…
I probably primed 12-13 times just to be safe.
I’d say it was probably about time for it to be changed anywho!
Yep... It was a good tip... Good for you...
I let the truck tell me when to change the oil but I only daily drive my truck. On the 3rd oil change, I also change my fuel filter set. I watch pre CP4 fuel pressure, from the DFCM, on my Banks iDash. If there ever was a problem, I'd see it and I don't... That's going by the factory fuel filter change procedure. If I ever start changing my oil sooner, I'll keep it at the 3rd oil change. I also have my oil analyzed by Blackstone but I am going to buy a kit from Oil Analyzers as well this upcoming change to compare it with the Blackstone report so I can get a more accurate fuel dilution %.
I'll find the last DFCM filter pic as mine was a lot lighter in color as the additive I use, K100D, puts the alphaltenes, back into the fuel as that's what makes the filters darken up I believe...
I’m now trying to find out what this lovely noise is.
Forget about any other issues with your truck. This sound needs to be front and center on finding the root cause. Sure sounds like a spun bearing to me. May want to pull the oil filter off and cut it open to inspect for any metal.
