low power/engine codes

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Jul 27, 2009 | 06:05 PM

#46

moethomas80

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Joined: Jul 2009

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From: East TN

Hey Nep is the fuel sending unit in the low side pumps in the tank? If so I assume that I will have to replace the whole pump...is this correct?

Jul 27, 2009 | 06:06 PM

#47

Neptoess

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From: Ohio

nope, the fuel pump and fuel pump sending unit are sold seperately on rockauto. I can link you if you want. It is in the tank though and connected to the fuel pump

Jul 27, 2009 | 06:06 PM

#48

moethomas80

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From: East TN

Don't think so Nep....I think there is one on the driver's side rail that looks pretty old. That was another piece I was going to change ....did I read that there are 2 fuel filters like what I have on my F250 PSD

Jul 27, 2009 | 06:06 PM

#49

moethomas80

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From: East TN

So the fuel sending units are not in the tank?

Jul 27, 2009 | 06:08 PM

#50

Neptoess

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From: Ohio

Sorry had to edit that. They are in the tank. You should change your fuel filter with your air filter, about every year. If it's clogged it can really cut into your power

Jul 27, 2009 | 06:08 PM

#51

Neptoess

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From: Ohio

Oh and sorry again. You have 1 fuel filter. There are little screens hooked onto your fuel pumps inside your tanks though, those too can become clogged, but are easy to visually inspect

Jul 27, 2009 | 06:10 PM

#52

moethomas80

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From: East TN

Thanks Nep....I will change the fuel filter and see if that helps but that wouldn't have anything to do with the fuel gauge problem would it? Also did you read my post about the story on the front fuel tank....Its a page or 2 back I think...

Jul 27, 2009 | 06:11 PM

#53

moethomas80

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From: East TN

Also would that make it run differently when it warmed up by that I mean not backfire as much through the manifold and lag

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Jul 27, 2009 | 06:18 PM

#54

Neptoess

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From: Ohio

fuel filter cloggage could cause lag. the sending units could likely be why your front tank is always reading full, and the rear one always saying empty could be a ****ed up float, or sending unit. But as always with trucks this old, check for corrosion on the wiring and such

Jul 27, 2009 | 06:23 PM

#55

Neptoess

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From: Ohio

also moe, does your truck have any codes?

Jul 27, 2009 | 06:26 PM

#56

moethomas80

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From: East TN

Nep...
Read an EGR code saturday but the tech said that was due to not having the TPS adjusted right also threw a 29 which he said was a false code. I havent tested since Ohm'n the TPS

Jul 27, 2009 | 06:28 PM

#57

Neptoess

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From: Ohio

yeah i don't think the EGR code is much to worry about. you'll lose about 1-2 mpg with a nonfunctioning EGR if that. Some people have none, I gained 2 mpg by getting mine working again. YMMV

Jul 27, 2009 | 06:30 PM

#58

Neptoess

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From: Ohio

code 29 is actually insufficient input from VSS

Jul 27, 2009 | 06:41 PM

#59

moethomas80

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From: East TN

Not too sound dumb but what is VSS?

Jul 27, 2009 | 07:47 PM

#60

Neptoess

Tuned

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From: Ohio

vehicle speed sensor. affects auto trans's shift points, speedometer calibration, and possibly some other stuff. not sure if it being bad could be causing the backfiring or lag since i don't think it controls fuel