Low Voltage to EFI Fuel pump in tank. Problem' and Solution's ?
SOURCE: 2000 FLHTCI burning out the ECU relay
Remove your ECU relay and your ECM fuse. Do not do anything else before you do this! Verify that all your battery connections are tight and clean, next any grounds for lamps, etc. make sure they are tight too. Replace relay and then fuse. Carry an extra relay with you and see how it goes. A loose or bad ground can cause a voltage spike which kills relays, fuses, and other parts. good luck.
JP
SOURCE: removing gas tank on harley flhtci
remove seat, remove console on top of tank, disconnect wiring from console to tank, disconnect vent line if present, disconnect fuel line on tank, disconnect fuel gauge (up under tank on left side, 3 wires, 4 wire connector, wires are yellow, orange, and black), remove bolt at rear of tank, remove two side bolts up front under tank (coil bracket is there also, carefully cut clamp on cross over hose located up front under tank.
This works better with three hands remove one side of cross over hose, fuel will flow freely so the extra hands are good at "plugging" the hose and the tank. Gently remove tank tilting front of tank as much as you can till you get it clear of the frame, while still tilted at a steep angle put the cross over hose back on.
To make things easier drain all fuel out of tank before reversing the process to reinstall tank. Hope this helps.
JP
SOURCE: 99 Harley FLHTCU EFI, engine occasionally dies, on
Sometimes there is adaquate pressure and we don't hear the pump, but it does pump while crank and running. A couple of things here, one is the fuel filter, etc. and battery. You did not say how many miles are on the bie, somethings like the fuel filter are usually replaced based on mileage; while depending whee you are 3 years on a battery is about all you can expect.
The reasons why the bike dies can be many, especially at low RPM or idle. Check your air filter, replace if needed. Change your plugs if they are questionable. Change your fuel filter if you have 40K miles on the bike. Unfortunately you could have a range of sensors that are "tired" or about to go bad if the problem persist. The easiest thing to do is take to your dealer if after changing plugs, fuel filter, and air cleaner doesn't help. The dealer will hace the specialty tools to test the sensors and other components that may be in question. Usually they can determine what needs to be done in less than an hour.
Hope this helps.
JP
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