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Strange steel fuel line

Mastiff

Mastiff

1/2 ton status
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My 83 K5 has 3 steel lines coming up the frame rail from the tank, the main fuel line, the return, and the tank vent line. The return line sticks way out from the frame at the split where it has a short piece of rubber. Anyone else have this, or know what the deal is? This is all factory original. I'm hoping to run a pipe alongside the transfer case and this stupid thing is going to make a tight fit.

20150223_202443.jpg
 
If I remember, I'll crawl under mine tomorrow afternoon. See whats there/snap a few pics. Unless someone has a answer before then.
 
Standard blazer. That is close to where the fuel filter is.
 
Someone has been into it before and probably just pulled to hard trying to remove the fuel hose and ended up bending the line away from the framerail. The giveaway about someone being in there is the fact that those hose clamps aren't factory and the rubber fuel line appears to be new.
 
4X4HIGH said:
Someone has been into it before and probably just pulled to hard trying to remove the fuel hose and ended up bending the line away from the framerail. The giveaway about someone being in there is the fact that those hose clamps aren't factory and the rubber fuel line appears to be new.
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I've had this truck since new. I recently replaced the rubber hose. For my TBI setup I originally started there and ran rubber up to the TB, but now I'm using the whole factory steel run and running the fuel from the front of the motor. I don't think I ever yanked on anything hard enough to bend it... maybe it got twisted in the mounting clamps somehow or something though.

It just occurred to me I have a pic from 15 years ago when I did the TBI. It was weird back then too.

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campfire said:
Why does your (non-diesel) truck have a fuel vent line? I thought that was a 6.2-only option... :dunno:
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Tank vent up to the charcoal. The unusual thing is the return line. For some reason the pump had an in and an out. I'm glad because it made the TBI conversion easier.
 
Mastiff said:
Tank vent up to the charcoal. The unusual thing is the return line. For some reason the pump had an in and an out. I'm glad because it made the TBI conversion easier.
Click to expand...

Ok. I have also wondered why they bother with a return line on a Q-jet, but I have seen that on other trucks (so it didn't seem so odd to me). I learn something every day around here!

And I'd also be glad for the return line if I was doing a TBI conversion!
 
1/4 Return line to combat vapor locking, some ran 3 lines at the fuel pump. Some early gm used with 400 and 454's had a fuel filter with 3 lines utilizing the return.
 
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