EFI return line, use emissions return?

"Too hot" is a luxury not seen to often in Norway, but on some summer days it can be! :)

Anyway, thanks for your answer Bill, this was most enlightening!

Apparently, it's been too long since I've been crawling under the old Dart now, forgot entirely about the sending unit back there, or at least that this is where the fuel line exited from!

An obvious solution would be to remove the sender and tig-weld in an extra tube for a return line if all else fails. Looked on E-bay as you suggested, but could only find senders with the one fuel exit pipe.

As for using the filler tube, its just a straight filler tube with no vents or connections, so that's an option I don't have.

The existing return pipe is corroded and has holes by the tank, so I'm replacing it with a fresh copper alloy tube instead. This tubing has an 8mm internal diameter, which I think should be OK for the return.

Good point about keeping any pressurized line out of the trunk!!

The Megasquirt has been very easy to work with and there's tons of info and help to be had on the web.
Seing some of the stuff you guys do, I'm surprised that not more people have gotten in to the Megasquirt thing!

And if you upgrade from narrow band to wide band O2 sensor, the thing will literally tune it self! Magic! :)