Ran out of fuel
Senior User
Joined: Feb 2007
Posts: 146
Likes: 0
From: Northern VA
I take mine down to 50 miles to empty, then fill.
Senior User
Joined: Feb 2007
Posts: 146
Likes: 0
From: Northern VA
My truck and trailer are parked over at my buddy's house right now. When I go over there, I'll try to remember to get out the manual and look up the page number. Pretty sure it was in the diesel supplement.
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
Your vehicle is equipped with a diesel fuel conditioner module (DFCM)
which recirculates fuel from the engine to help prevent fuel filter
clogging. Your vehicle is also equipped with a bypass relief valve, located
in the fuel tank pick-up boot, which provides fuel flow to the engine if
the fuel pickup should become plugged. To allow the bypass valve to
function and avoid engine fuel starvation during cold weather operation
of 32°F (0°C) or below, it is recommended that the fuel level in your
tank should not be allowed to drop below
which recirculates fuel from the engine to help prevent fuel filter
clogging. Your vehicle is also equipped with a bypass relief valve, located
in the fuel tank pick-up boot, which provides fuel flow to the engine if
the fuel pickup should become plugged. To allow the bypass valve to
function and avoid engine fuel starvation during cold weather operation
of 32°F (0°C) or below, it is recommended that the fuel level in your
tank should not be allowed to drop below
1⁄4 full. This will help prevent
air from entering the fuel system and stalling the engine.
Thread Starter
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Elder User
Joined: Mar 2011
Posts: 537
Likes: 8
That sounds like a very different issue to me and certainly doesn't sound like it's going to hurt anything other than maybe clog the fuel filter. I doubt the air itself does any harm. But thanks for posting that as it is good to know.
Lead Driver
Joined: Apr 2011
Posts: 7,302
Likes: 1,153
From: Edmonton Alberta
These trucks definately have some sort of safety in place to protect the HPFP when there is no fuel. I just read a post on another site and put 2 and 2 together.
Some of H&S earlier tunes used to run the fuel rail dry which caused the HPFP fuel pressure to drop. When the pressure drops below ?? (what is should be??) the truck shuts down and throws a code. I don't remember the code but it equates to "your fuel system has a leak". I would have to coast to a stop and turning the truck off and on clears the code. The truck woudl start and run fine.
Someone told me that if you went into diagnostics (on the Black Maxx) you could clear the code and the truck would re start itself if still coasting. I was never able to do this in a timely (safe) manner so I can't confirm.
So maybe runnign out of fuel is not as bad as we think it is?
On another note, we are runnign out of diesel around here already! Had to go to 3 stations yesterday to find some. A BIG truck stop here is closed until the 15th because of no deisel. So ai may end up pusing it al little too far some time this winter!
Some of H&S earlier tunes used to run the fuel rail dry which caused the HPFP fuel pressure to drop. When the pressure drops below ?? (what is should be??) the truck shuts down and throws a code. I don't remember the code but it equates to "your fuel system has a leak". I would have to coast to a stop and turning the truck off and on clears the code. The truck woudl start and run fine.
Someone told me that if you went into diagnostics (on the Black Maxx) you could clear the code and the truck would re start itself if still coasting. I was never able to do this in a timely (safe) manner so I can't confirm.
So maybe runnign out of fuel is not as bad as we think it is?
On another note, we are runnign out of diesel around here already! Had to go to 3 stations yesterday to find some. A BIG truck stop here is closed until the 15th because of no deisel. So ai may end up pusing it al little too far some time this winter!
Senior User
Joined: Dec 2010
Posts: 277
Likes: 0
ken
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Posting Guru
Joined: Jan 2010
Posts: 1,616
Likes: 6
From: Whitecourt AB, Canada
I normally run it down to when it estimates 15km to E but I guess that might not be such a good practice if I don't know for sure if I can get fuel right away.
Senior User
Joined: May 2008
Posts: 120
Likes: 0
I noticed that a few folks said they fuel up only when they get down to 50 miles to empty. I would strongly suggest changing that habit. Lots of nasty stuff happens out there that can create temporary fuel shortages and can leave you stranded. Earthquakes, tornadoes, hurricanes, flooding, freak storms, (etc) can end up leaving you stuck somewhere at a really bad time. For no other reason than disaster preparedness, I consider my tank empty at 1/4.
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
Some of H&S earlier tunes used to run the fuel rail dry which caused the HPFP fuel pressure to drop. When the pressure drops below ?? (what is should be??) the truck shuts down and throws a code. I don't remember the code but it equates to "your fuel system has a leak". I would have to coast to a stop and turning the truck off and on clears the code. The truck woudl start and run fine.
Someone told me that if you went into diagnostics (on the Black Maxx) you could clear the code and the truck would re start itself if still coasting. I was never able to do this in a timely (safe) manner so I can't confirm.
So maybe runnign out of fuel is not as bad as we think it is?
Someone told me that if you went into diagnostics (on the Black Maxx) you could clear the code and the truck would re start itself if still coasting. I was never able to do this in a timely (safe) manner so I can't confirm.
So maybe runnign out of fuel is not as bad as we think it is?
When you run out of fuel, the low pressure supply line has air bubbles in it which end up in the HPFP. Air doesn't lubricate, and therefore metal-to-metal contact occurs and premature pump destruction follows.
Now the situation you're talking about is when the injectors spray fuel faster than the pump can keep up with, and it causes a low pressure condition on the rails. This makes the truck think something is wrong, which could be out of fuel, bad VCV, PCV, HPFP, or any other of the myriad problems that can happen with these trucks. Note that the fuel supply to the HPFP is not interrupted here, so air never gets to the HPFP, and there is no irregular wear. It just can't keep up, but this won't cause any damage.
Posting Guru
Joined: Jan 2010
Posts: 1,616
Likes: 6
From: Whitecourt AB, Canada
I noticed that a few folks said they fuel up only when they get down to 50 miles to empty. I would strongly suggest changing that habit. Lots of nasty stuff happens out there that can create temporary fuel shortages and can leave you stranded. Earthquakes, tornadoes, hurricanes, flooding, freak storms, (etc) can end up leaving you stuck somewhere at a really bad time. For no other reason than disaster preparedness, I consider my tank empty at 1/4.
Lead Driver
Joined: Apr 2011
Posts: 7,302
Likes: 1,153
From: Edmonton Alberta
Nope, it's every bit as bad as we think it is. Consider the difference with me for a minute:
When you run out of fuel, the low pressure supply line has air bubbles in it which end up in the HPFP. Air doesn't lubricate, and therefore metal-to-metal contact occurs and premature pump destruction follows.
.
When you run out of fuel, the low pressure supply line has air bubbles in it which end up in the HPFP. Air doesn't lubricate, and therefore metal-to-metal contact occurs and premature pump destruction follows.
.
Senior User
Joined: Jul 2010
Posts: 436
Likes: 2
From: Salt Lake City, UT
Fine, valid points in light of the current situation, it's just that I don't want to be visiting a service station that often and especially with the $100 pump limit (unless I stop, pay for the first $100, repeat and pay for the remaining $30) it hasn't been a full tank fill lately anyway.
Lead Driver
Joined: Apr 2011
Posts: 7,302
Likes: 1,153
From: Edmonton Alberta
That's actually part of the reason I fill up earlier....to avoid having to re-run the card twice and take the extra time. I'll go down to 1/4 or a little under on longer road trips, but other than that I've been filling up between 1/4 and 1/2 so that I have a quicker and less frustrating fill up.
Thanks