This happened over a year ago, offered to square away friends 240 turbo 84 ish type. He brought a new main and in tank pump as the car had plagued the past owner who had replaced them before on more then one occasion.

First I repalced the main pump then started on the intank pump... the pump has 2 metal tabs which attach at the pump where they slide over a stud and are captured by 2 small nuts -one on each post, the far end of the metal tab has a hole drilled and the incoming wire ( grond and hot ) is one each slide through the each of the metal tabs holes and soldered - this is part of the wire harness and something you would not noramally pay any attention to. In this case we where upgrading to a 740 pump using the origional sending unit so it was nesasary to remove the nuts on the old pump to install the new one. In doing so I discovered that the wire was loose in the hole. At this joint the soldered was not flowed well ( cold joint ) and 100 to 1 had caused the previous owner much grief to the point the car was sold to the new current owner who ended up at my place to replace all the fuel pumps. It is very apparent that if you replace the intank pump one must be suspicious of this solder joint. I was some upset just thinking about how poor the quality of the solder joint was and the consequences it might cause short of ruining the main pump it could literally blow your car to bits as even a normal pump draws a couple amps and this joint could not only heat up but could arc. noff said