85 Fiero problem solved ! (Page 3/3) Patrick MAR 20, 08:56 PM quote Originally posted by Lou6t4gto: ...the pump was running BACKWARDS ! The new plug (pigtail) that came with the pump was wired Backwards (color coded)(neg in positive place and positive in neg spot !!!!!) Wow, good thing you checked the new pump before reinstalling the tank! Was the old pump dead? Lou6t4gto MAR 21, 09:56 PM Was the old pump dead? was when I took it out, Now jumping it "out of the tank", it spins ! "IN" the car, it WAS getting power sent to it, but would not run. yes, when the tank was out, I Checked EVERY WIRE AND CONNECTION from the pump to the sender, the sender to the plug, plug to 203, 203 to fuse, there was power at the relay and the relay is new. Phil MAR 22, 10:24 AM Remember - there 2 sides to a circuit- power and ground phonedawgz MAR 22, 11:35 AM I had a problem with an S10 where the fuel pump would randomly not work. Turned out to be a loose terminal in the plug that plugged into the fuel pump. Dropped the tank several times before finding it. Solved it by testing the pump out of the tank and wiggling the wires. You don't want to be pumping gasoline when testing the pump outside the tank. I used diesel. But the problem came down to a terminal that had gotten too loose on the pin inside the connector. The final solution was to solder the terminals directly on the pump's pins. It solved the problem. mcguiver3 MAR 22, 12:27 PM I had the same problem with my 88 Formula race car. I ran a new separate ground wire from the pump to chassis and solved it.