What's the original configuration for your EEC (vapor canister) truck? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**71CHEVYSHORTBED402** · 05-06-2017, 01:47 PM

Having trouble confirming the original set-up for my 71, so I'll try this.

I'd like to reconnect the EEC to factory. The fuel sender has one 3/8" line that runs to the fuel pump. There's a 5/16" line, which is the vapor line. That's hooked up to a second port on the existing fuel pump, so I believe it just acts as a return line. That tells me, assuming the sender/tank are original, and I believe they are, that the original fuel pump had just one port (i.e., fuel source and no return line). Appreciate any corrections to that assumption.

There may and probably were some variances. There may also be an A/C factor, so I included it.

Thanks for chiming in.

View Poll Results: Your original EEC system?
My truck has/had EEC with a SINGLE line Fuel Sender (no return line). The truck has A/C	3	20.00%
My truck has/had EEC with a SINGLE line Fuel Sender (no return line). No A/C	2	13.33%
My truck has/had EEC with a DUAL line Fuel Sender. The truck has A/C	2	13.33%
My truck has/had EEC with a DUAL line Fuel Sender. No A/C	5	33.33%
Happy to say it never had it.	3	20.00%
Voters: 15. You may not vote on this poll

05-06-2017, 01:47 PM	#1
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,230	What's the original configuration for your EEC (vapor canister) truck? Having trouble confirming the original set-up for my 71, so I'll try this. I'd like to reconnect the EEC to factory. The fuel sender has one 3/8" line that runs to the fuel pump. There's a 5/16" line, which is the vapor line. That's hooked up to a second port on the existing fuel pump, so I believe it just acts as a return line. That tells me, assuming the sender/tank are original, and I believe they are, that the original fuel pump had just one port (i.e., fuel source and no return line). Appreciate any corrections to that assumption. There may and probably were some variances. There may also be an A/C factor, so I included it. Thanks for chiming in. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 05-06-2017 at 02:03 PM. Reason: Clarification



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