SOURCE: fuel pump
Can you hear the pump when you turn the key on normally? When the pump on my old FJ starts up with the key, it makes enough racket to let you know. Your bike is alot smarter than mine, it might be able to tell that the lines are unhooked and preventing the pump from working as a safety thing. Is the fuel line made of or contain any metal? It may need to see continuity in the fuel system to allow the pump to operate. Or some other parameter is not being met with the lines disconnected. Have you tried thumbing the starter with the lines off? The bike might only pressurize the system when the engine is starting or running.... actually, this is my best guess now that I think of it.
SOURCE: 1999 Ducati 996 Will not start
yes, it is either the ignition relay which also runs the fuel pump or the feul pump itself is either locked up or just has gone bad. you should charge your battary then try it again and that does not work you can try hitting the feul pump with a small hammer after you have removed it from the tank, this sometimes will get it going again. i've had brand new bikes just out of the crate need a shock to the fuel pump to get it going. it's a contact problem between the brushes and the commutator of the starter motor. something else to look at before toy take the pump assembly out of the tank is to varifey voltage at connector body of the fuel pump under the tank. find an electrical diagram to find out which wires send the voltage to the pump, if you have voltage there at key on then you will have to pull the pump out. hit it with a small hammer on the body of the pump motor and plug the assembly back into the bike and hold the pump upright over a small container to catch gas that may come and turn the key again. if it does not run you will have to buy a new pump.
SOURCE: Fuel System in Ducati DARK 600 Monster,
Strip and clean carbs, I had the same problem and that's how I fixed it. Take the carb to bits then soak all the bits in clean petrol (or prpsi believe it or not) for 1/2 an hour.
SOURCE: Aprilia Mille, swapped out the gas tank and bike won't start now
check the relay. I'm looking for a fuel tank too do you want to sale the old tank? [email protected]
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