Allot of fuel can come out of an unplugged return line. Yesterday I fueled up, checking under hood, of course, got home, went in the house, came back out an hour later and theres a big puddle of fuel under the car. It was leaking at a return hose connection on #3 injector (hardest too get to) . The car was stopped and fuel was running out the return hose when I pulled it off the injector. I guess I have never changed return lines on a 123 with a full tank of fuel  I can imagine how much would be squirting out when under way.
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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug
"Lifes too short to drive a boring car"
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