FI fuel return line

My poor experience with external pumps led me to use an internal. Had to replace the gas tank anyway, and built my own tank, so internal was easy at that time.

My car was built to be a daily driver. It was driven back and forth to work and on 2-3 day long (6-8 hours on road) trips a year for around 5-6K miles a year. 4.6L stroker with RENIX EFI at the time. I used the factory Jeep wiring for the fuel pump, which included a ballast resistor to reduce voltage to the pump during low demand. I still use that system with the internal pump. It's a return line system with vacuum referenced regulator on the fuel rail.

I used a Carter external pump at first. It lasted about a year. Then I used some aftermarket Mercedes pumps. The first only lasted about six months, the second about 18 months. I purchased three on a close-out deal, may have been closed out due to quality issues since they were made in a former communist block country (I forget which... Czechoslovakia or East Germany?). About this time I had tired of fixing leaks in my old original gas tank and made a new one, switching to the early Jeep internal pump. I have only replaced it once since first installing the new tank and pump around 2005. Stopped using the car as a daily driver around 2009, just occasionally driven since. But the internal pumps last! I always carried a spare external... at least they were quick and easy to change out. I gave away that last ex-commie pump I had.