Jump to content

Converting in-tank fuel pump to frame rail type

mauigene

Recommended Posts

mauigene New Member

mauigene

Posted
Posted

Have a 96 K3500 Silverado that eats fuel pumps. On number 5 currently. Is it advantageous to convert to either a frame-rail type pump or under hood type.

If i convert can i use the original pickup tube and strainer sock and just eliminate the motor? How will it effect fuel pressure regulator or ecm? Kinda gettin tired replacing these. I used to have a frame rail type on another 454 vortec i built and that pump went 20 years. They say the pumps now days are all import. The last two i bought were oem delco. Any ideas? Mahalo. 

davester Senior Enthusiast

davester

Posted
Posted

Do you know what's going wrong with the pumps?  Running the tank dry is one way to wreck them quickly.  It could also be bad connectors, or crap in the tank.

 

I'm just saying you are either very unlucky, or it might be something else, as I haven't seen any other posts about pump's failing regularly for people.

Mikebtte Enthusiast

Mikebtte

Posted
Posted

That would be a negative. In tank fuel pump will out last a frame rail. I run a frame Rail on my 59 conversion and I have to run a high dollar Delphi to keep it going. With the Fuel injection you have on the Vortec the fuel pressure would be even higher. Are you using a quality in tank pump? and is the fuel pressure regulator working correctly. Could be the pumps are overworked.

mauigene New Member

mauigene

Posted
  • Author
Posted

The first two pumps were least expensive, next two Delco oem.

Tank is spotless as is strainer upon removal. Voltage has only slight line loss due to length of run. 2 new grounds have been added. On third Delco fuel regulator, tried to match when Delco pumps were installed.

All have same problem, fuel pressure drops to about 38 to 42 on hauling loads.

After 6 months I can feel degradation of power, then stumbles, idles rough, etc.

Throw in a new one and off we go for another 6mo to a year. Have changed fuel filters about a dozen times. All been super clean. All new upper end from injectors up, everything changed. I feel it's electrical, maybe in the relays or ?

Even had on scopes twice. At my wits end. Thanks

 

Mikebtte Enthusiast

Mikebtte

Posted
Posted
9 hours ago, davester said:

could the evap system be failing, so the pumps die over time from having to draw from too much vacuum in the tank?

I agree, could be the tank vent not letting in air.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • KARNUT
      Missing thrust bearing? And oil selection

      By KARNUT · Posted

      I find it amusing the OP doesn’t realize this threads heading includes several engines. He should have posted in the off topic section if he wanted a more narrow focus. I really appreciate and find amusing that he actually pointed out one of my many vehicles. The Odyssey. That happens to use 0-20 oil. I love pushing his buttons. 
    • Black02Silverado
      Missing thrust bearing? And oil selection

      By Black02Silverado · Posted

      Maybe, but it seems he is the only one that has backed up data to prove what he is stating. I think he is doing this more because he enjoys it and wants to get the information out to us. He's got the knowledge and access to the proper equipment and having the funds doesn't hurt.  I would love to do what he is doing and would do it if and when I hit the Powerball.  I'm not a Tribologist by any means but love to learn what I can.   I would bet there would be doubting people out there if a completely independent lab with high quality work and highly respected in the automotive industry, put out information like this.  The world can't be pleased, one just has to take the information that they are given, do more of their own research to find actual lab data to back up what they are trying to figure/find out.  Most don't bother, they just want to believe what they first see.     I don't have the minimax but my 6.2 in my 2019 Silverado with 64k miles shows excellent UOA results with 0w-20 and for my own purposes 5w-20.  Since not much of a change using 5w. I liked the data sheet information on the SS 5w-20 and figured I would give it a try.  Still the same viscosity at 100℃.   In the end we all just do what makes us happy, life is too short to get upset over trivial social media.   On a side note, I do feel GM has dropped the ball and just cares about the bottom dollar and not quality anymore.  "Like a Rock" has been long gone.  Seems "Built Ford Tough" has as well.
    • Tyler Gibbs
      Thoughts on these wheels?

      By Tyler Gibbs · Posted

      Better than stock but that's like putting lipstick on a pig
    • flattop
      2026 sierra bad brake controller

      By flattop · Posted

      Hello, my 3 month old Sierra Elevation wont recognize a trailer with electric brakes? All the lights work correctly, but no power to the brakes?   This is the factory installed brake controller. If you manually push the knob, the display shows the power % but does not light up like my 2022 silverado.   I have an appointment with the dealer, but was checking to see if anyone else has seen this issue.    Thanks, 
    • Black02Silverado
      Post your latest oil change.

      By Black02Silverado · Posted

      Been using SS 0w-20 from new, but wanted to change to the 5w-20 because I liked the data on the data sheet, to me it seems like a little better product. But as you can see, not much difference. This is also with running a mix of 10 gallons E85 to a tank topped with 93. It isn't a flex fuel vehicle so any higher I get a CEL for running lean on both banks. Yes my mileage takes a hit. Instead of 20 mpg I normally get on trips I get 17mpg. This is also using EaO17 filter.  What is amazing is I have the AMSOIL cone filter on it since I have the GM Performance intake installed and that air filter has 44k miles on it.  I just take it out and shop vac it off once a year.  I use the upholstery tool on my shop vac.  Works well.   

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...