When low on fuel...
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Fleet Owner
Joined: Mar 2003
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From: Blue Hill Township
When low on fuel...
When your truck is low on fuel does it stutter or stumble when taking off? Ours seems to do that when it gets down towards E and I Was just wondering if anyone else has the same thing happen to them.
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Joined: Jan 2006
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From: McNairy county, TN.
Personally I do not like to let my vehicles get below a 1\4 tank for several reasons,
1; most of your intank fuel pumps are fuel cooled, when ther is no fuel around them they tend to get warmer and wear out faster.
2; on diesels, if the fuel gets too low you will suck air and if you have ever tried to prime a diesel........................on gas motors they will suck air and stumble as you have mentioned.
3; what if........... some emergency arises where there is no power to the pumps in your area, only 50 miles away. Do you have enough to get there.
I like to hope for the best, but always prepare for the worst!
1; most of your intank fuel pumps are fuel cooled, when ther is no fuel around them they tend to get warmer and wear out faster.
2; on diesels, if the fuel gets too low you will suck air and if you have ever tried to prime a diesel........................on gas motors they will suck air and stumble as you have mentioned.
3; what if........... some emergency arises where there is no power to the pumps in your area, only 50 miles away. Do you have enough to get there.
I like to hope for the best, but always prepare for the worst!
Freshman User
Joined: Dec 2005
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My 98 xp does the same thing when low on fuel, around a qtr tank. Ive been low on fuel and parked on a downgrade only to find the truck wont start as if out of fuel completely\ I guess the pickup is in the rear of the tank .. I have heard of the same issue with the fuel pump overheating and quitting prematurely somewhere, probably on one of these forums. Lately i just keep the tanks above a qtr tank and i havent had the stuttering and misfiring i used to have. I wonder if I should change the fuel pump, its probably pretty expensive though and probably better if i just let it go out completely before i change it.
Elder User
Joined: Mar 2005
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From: Cornelius, Oregon
Originally Posted by westtntrucker
1; most of your intank fuel pumps are fuel cooled, when ther is no fuel around them they tend to get warmer and wear out faster.
Now... letting the tank get low enough that the pump sucks air IS a quick way to destroy the pump, so you're probably right about not letting the tank get too low, but not because the fuel pump is exposed.
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Senior User
Joined: Mar 2006
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i've let the fuel low light come on a few times and no stumble problem. was going to suggest fuel filter but since its done it from new?
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I was having that symptom,among others, of course as anyone here you read my post on "starting issues/2001 EXP", it did turn out to be the fuel pump. I would not recommend if it is the fuel pump, and only if it is the fuel pump, on letting it go out first before replacement, cause to be stuck in the middle of nowhere is not a picnic. Any qualified mechanic or yourself for that matter ,can check the fuel pump and see if it is working properly. Mine I guess were not qualified. Good Luck!
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Originally Posted by shandell
I was having that symptom,among others, of course as anyone here you read my post on "starting issues/2001 EXP", it did turn out to be the fuel pump. I would not recommend if it is the fuel pump, and only if it is the fuel pump, on letting it go out first before replacement, cause to be stuck in the middle of nowhere is not a picnic. Any qualified mechanic or yourself for that matter ,can check the fuel pump and see if it is working properly. Mine I guess were not qualified. Good Luck!
Freshman User
Joined: Jan 2007
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If you can locate the post of mine 2001 Exp/Starting issues under search, a really nice person posted in detail how to check the fuel pump pressure. I tried to copy and paste it here but it did not work for me. Sorry. Maybe someone else has the know how to do it if they see this post. I will try it for you again.
Tuned
Joined: Sep 2003
Posts: 296
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From: north carolina
Shandell,
The 2K Expy 5.4 has a schrader valve on the passenger side fuel rail. Hook up a fuel pressure gauge to this port to check fuel pump pressure. When you turn key to "on", the pump energizes and you should get a pressure reading at the rail.
The 2K Expy 5.4 has a schrader valve on the passenger side fuel rail. Hook up a fuel pressure gauge to this port to check fuel pump pressure. When you turn key to "on", the pump energizes and you should get a pressure reading at the rail.
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