Newbie from Eastern Washington.

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WFO

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Location
Texas Panhandle
First Name
Dan
Truck Year
1986
Truck Model
K20
Engine Size
350
Welcome from the Texas Panhandle.
Is that a 396 from the 60s, or a 402?
 

Craig Nedrow

NADAR UNDER THE RADAR
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Location
Washington State
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Craig
Truck Year
1973 (have two), 1985
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K10, K20, C20
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350, 454, 6.2 Detroit
Cool, another norwester, I'm from Selah
 

81K30

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Location
Eastern Washington
First Name
Adam
Truck Year
1981
Truck Model
K30
Engine Size
396
Welcome from the Texas Panhandle.
Is that a 396 from the 60s, or a 402?
Good question. When I ran the numbers on the back of the block, it came back as a 396.


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Grit dog

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Auburn, Washington
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Todd
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1986, 1977
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454, 350
Towards the West coast. You know, near Seattle where it's been such a great tourist attraction as of late....

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Perzactly!
 

81K30

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Eastern Washington
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Adam
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1981
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K30
Engine Size
396
[emoji1787][emoji1787][emoji1787]


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RedBeard_83

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Florida
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Cory
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1986
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Custom deluxe
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Sbc 350
Welcome from Florida

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81K30

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Eastern Washington
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Adam
Truck Year
1981
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K30
Engine Size
396
Hello all,

I went to fill up my dual tanks this AM and the gas doesn’t seem to be getting drawn out of the RH (passenger’s side tank).

After searching the net and this forum, there is some conflicting info on the valve that controls the dual tank set up near the tanks. The info seems different based on year. School me if I’m wrong.

I did purchase a new dash switch, hoping that will solve the problem, BUT (gotta love big buts!?) what other possible causes should I be looking for? It’ll be a few weeks before I can real world test the switch as I switched it over to the LH side after I installed the switch.

Also, is there a specific Ohm reading I should be getting at the dash switch power input, and then for output?


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Grit dog

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1986, 1977
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Engine Size
454, 350
I’d say switch, fuse, wiring or tank selector valve. Doesn’t really narrow it down, lol.
What I was told though is the selector valve operates such that switching one way energizes the valve and switches to that tank. Switching the switch to the other tank de energizes the tank valve and essentially “defaults” to that tank in the event of a short, bad switch etc.
Idk which tank is the default, but one might assume it’s the left or drivers side since that is the typical side on single tank trucks?
Maybe helps in your diagnosis.

why do you say you can’t test switching the tanks?
 

ali_c20

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Location
Austria
First Name
Alexander
Truck Year
1974, 1979
Truck Model
C20, K5
Engine Size
350, 350
Welcome from Austria! Nice truck!
 

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