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Old Oct 29, 2018 | 06:43 PM
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Fuel pump

New to diesels, got a question,

Is there no fuel pump in the tank? Is it just the sending unit for fuel level? I'm not finding much online.

I'm getting p0460 and my gauge is bouncing around never giving a correct reading and reads empty often.

Thanks
 
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Old Oct 29, 2018 | 06:47 PM
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From: West by God Virginyuh
Pump is on the frame rail, part of the HFCM

Do you have gauges to monitor what the sending unit is reporting? My fuel gauge drops to zero at times, but I actually think it’s my dash cluster, or the “fuel level smoothing thing” ( I forget what it’s called, but it makes your fuel gauge read steady instead of fluctuating with the slosh of fuel in the tank) as the readout on my DashDaq tells me how much actual fuel I have.
 
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Old Oct 29, 2018 | 06:49 PM
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Originally Posted by tfunk88
Pump is on the frame rail, part of the HFCM
Ok that's what I kept reading but wasn't sure, every gas truck I've worked on has been in the tank.

So to fix the p0460 I just need to replace the sending unit in the tank?
 
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Old Oct 29, 2018 | 06:53 PM
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From: West by God Virginyuh
Originally Posted by Fordrocks689
Ok that's what I kept reading but wasn't sure, every gas truck I've worked on has been in the tank.

So to fix the p0460 I just need to replace the sending unit in the tank?
It may be the thing I referenced when I edited my reply. There’s a module behind the gauge cluster that smooths out the input from the sending unit so your fuel gauge doesn’t bounce around as the fuel sloshes in the tank.
 
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Old Oct 29, 2018 | 06:57 PM
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Originally Posted by tfunk88
It may be the thing I referenced when I edited my reply. There’s a module behind the gauge cluster that smooths out the input from the sending unit so your fuel gauge doesn’t bounce around as the fuel sloshes in the tank.
No the truck is completely stock, it was used and abused, I'm getting p0460 and p0463, so I was leaning more towards the sending unit. I just looked up prices for them though so I may just be living with it. I have a scanner that can read fuel level percentages??
 
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Old Oct 29, 2018 | 06:57 PM
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From: West by God Virginyuh
Also maybe try Chevron Techron Plus Concentrate, as it reportedly has stuff in it to clean your sending unit
 
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Old Oct 29, 2018 | 07:02 PM
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From: West by God Virginyuh
Originally Posted by Fordrocks689
I have a scanner that can read fuel level percentages??
I dunno, that’s what I was asking

Mine does, and so when my fuel gauge acts up I still basically know how much fuel is in the tank, although it’s the raw signal so it moves around as the fuel sloshes in the tank. It sorta sounds to me like your fuel gauge “smoother” is going bad, but I could be wrong
 
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Old Oct 29, 2018 | 07:06 PM
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Originally Posted by tfunk88
I dunno, that’s what I was asking
Ahhhh I thought you were asking like aftermarket gauges or something, my bad. Ok so I'll use my scanner and monitor tank percentage and if my gauge says empty but the scanner says %50 then it's probably my gauge that's messed up.

Am I on the right track here?
 
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Old Oct 29, 2018 | 07:12 PM
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From: West by God Virginyuh
Originally Posted by Fordrocks689
Ahhhh I thought you were asking like aftermarket gauges or something, my bad. Ok so I'll use my scanner and monitor tank percentage and if my gauge says empty but the scanner says %50 then it's probably my gauge that's messed up.

Am I on the right track here?
I think so
 
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Old Oct 29, 2018 | 08:12 PM
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It's not acting up right now, so tomorrow I'm going to fill up the tank and see what happens.

I was able to manual control my gauge with my scanner and it worked just fine. I read online people were able to repair the sending unit with units from 2001 Lincoln's but that was on a 7.3 and a lot of the links don't work anymore. :/
 
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Old Oct 29, 2018 | 09:32 PM
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Originally Posted by tfunk88
Also maybe try Chevron Techron Plus Concentrate, as it reportedly has stuff in it to clean your sending unit
In a gas engine yes, works really great.........the stuff has no business in the tank of a diesel anything
 
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Old Oct 30, 2018 | 03:40 AM
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From: West by God Virginyuh
Originally Posted by navistarnut
In a gas engine yes, works really great.........the stuff has no business in the tank of a diesel anything
Hmm...the Ford TSB regarding this issue says to use it?

Or maybe the person who copied and pasted the TSB in the threads I’ve seen added it in...just looked it up again and don’t see the Chevron mentioned on the TSB
 
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