Author Topic: 1980 K20 Fuel problem  (Read 2692 times)

Offline 780K20

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  • Diesel Girl of the Great White North
1980 K20 Fuel problem
« on: November 12, 2015, 10:01:27 am »
I'm having a fuelling problem as well

Yesterday I was trying to take my K20 home to the farm from the city (1.5 hr drive north). Got about 20 minutes out of town and it died on me on the side of the highway. Fuel tank was right full, checked my clear plastic fuel filter and it was empty. Poured gas in the carb and it would start that way but of course wouldn't stay running. The system would pressure up but no gas would get to the filter let alone carb. I'm guessing my fuel pump should be ok, and there may be a blockage? The truck hasn't been on a long trip for who knows how many years. Where would I start looking for a blockage?

Thanks!
« Last Edit: November 12, 2015, 05:48:32 pm by bd »
-Shelby

1980 K20 Mud Truck Project
2004.5 LLY Duramax - lifted, deleted & EFI Live

Offline timthescarrd

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Re: 1980 K20 Fuel problem
« Reply #1 on: November 12, 2015, 07:18:00 pm »
What do you mean when you say the system would pressure up?  Has it been converted to an electric fuel pump?  Also are you sure your tank was full, old gauges go bad.

From what you're describing, if it's stock I would say the fuel pump did go bad

Offline Jason S

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Re: 1980 K20 Fuel problem
« Reply #2 on: November 12, 2015, 10:04:53 pm »
Dual tanks? 

1973 GMC K2500, Super Custom, Camper Special, 350, TH350, NP203, 4.10's
1974 Chevrolet K10, Custom Deluxe, 350, SM465, NP203, 3.73's

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Offline 780K20

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Re: 1980 K20 Fuel problem
« Reply #3 on: November 13, 2015, 12:27:02 pm »
Sorry everyone, didn't realize admin made my reply into a separate topic - thanks!

I'm hoping it is something simple as switching out to a new pump; it has all original parts. I will be taking an electric fuel pump out there tomorrow (better than a mechanical one, right?), as well as some tools and such to make sure I don't have a blockage in my fuel lines.

This truck only has one tank, that should narrow down the problem solving I hope. I filled my tank right full with a jerry can just in case. I need to replace that old fuel gauge, it is way out to lunch (priority #2 on the list).
-Shelby

1980 K20 Mud Truck Project
2004.5 LLY Duramax - lifted, deleted & EFI Live