'78 K10 Build

[revvin7]

Glad it runs good! Cant wait to go out next year and have some fun trying to break them!

 

[Mark1968]

Make sure your tank selector switch is on either left or right tank. If it is in between it will read past full. Drove mine for 3 days before I caught that.

Have you done the headlight relay mod yet?

 

[78SWB]

I already tried that and it didn't do anything. The tank came out if the pass side of the donor truck and it's now on the drivers side of my truck.

Have not done the relay mod yet. Read about it once but forgot about it.

 

[skunked]

Glad to hear it's up and running again.

Hows it plumbed now? Did you remove the selector valve?

I just fixed my fuel gauge after ditching my saddles for a k5 tank. In the end I pulled out all the tank selector crap, found the one sending unit wire (pink/?) at the tank selector valve and extended it back to the sending unit.

 

[78SWB]

There is no selector valve anymore. It's just a fuel line and return line now.

 

[80' 427]

but did you run the pink wire to the sender? You have to do that.

 

[skunked]

but did you run the pink wire to the sender? You have to do that.

 

[78SWB]

I'm tracing wires now and it doesn't look like it. That pink wire runs down the pass side and across to the drivers tank?

 

[80' 427]

It runs to the switcher then to both tanks or just to one tank like on my k30 that didn't have a dual tanks.

 

[78SWB]

We ran the old sender wire to the in tank pump from the donor truck but that wire is blue. Also ran a power and ground to in tank pump. In theory it should work but it reads way above full. There are 4 wires running on the driver side for fuel. 1 blue which was the old sender wire, 2 pink( or they at least look pink), and one green.

 

[78SWB]

Does the sender need power?

 

[80' 427]

Nope it reads resistance to the ground 0-90 ohms.

 

[andyblack]

I don't think it's the sender that needs grounding, but the gauge itself (?) I don't know but what happened to the wire that was on your original tank ground?

 

[80' 427]

the sender adjusts the amount of ohms going to the sender wire. the sender of course needs to be grounded.

 

[andyblack]

Makes sense. So he doesn't have the original wire anymore then.

 

[80' 427]

that is how it seems.

 

[78SWB]

I think my issue is a bad ground because everything else seems to be hooked up correctly. I was just outside and started to redo the ground when the solder pulled off of the pump . So now I have to drop the tank to fix it.

The ground was so bad that I doubt it was working. It was rusty under the bolt and when I backed the bolt of with my cordless impact it blew the wire to pieces. I also noticed the wire was corroded under the coating when I went to splice it for new wire.

 

[78SWB]

I guess I should update that the truck ran really well yesterday on its first offroad adventure since its been back together. I am really happy with the TBI and hydro clutch.

Few pics but some are the same as in HINZ28's thread.

Hard to get action shots out there.

 

[Stein]

And not even one single call or text to attend.

 

[80' 427]

Me either.