Hello everyone, I am new and this is the reason. I have a problem with my fuel pump and I don't know how to resolve it. I have a 2008 Infiniti G37 sport, fuel pump went bad, changed it with a Delphi pump, easy enough. The problem is now after the change I get a a p0463 code and a check engine light. I then change the adjacent fuel sensor and that didn't help at all. When the car has a full tank, the gauges read correctly but when the gauge goes to anything other than full, miles to empty go to anywhere between 50 and 0 and gauge drops to empty. I then changed the AC Amp Module with a Infiniti OEM model, again no change. My final conclusion is that the Delphi pump isn't the exact same resistant factors, so the ECU is rejecting it. I tried to get a new OEM pump 17040jl60a but they have been discontinued. Pump can't be had unless I get a used one from eBay. Car still drives and runs fine with the Delphi but no fuel gauge. Does anybody have any idea of something else to try or where I can source an OEM pump? Or can I merge the old one with the new one somehow, I don't know. Please start throwing some suggestions for me. I would appreciate it. Thanks everyone!