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I have an 1987 Minnie Winnie motorhome with the Ford carberated 460 and it starts after pumping the gas 5-10 time, runs for 5-10 seconds and stalls, I pump it again 5-10 times and starts again...I have replaced the carb, plugs, wires, coil, fuel filter seems good...any ideas would be really appreciated as it is stuck in a campground with winter knocking on the door....
Does it roar to life and as soon as you let go of the key just wind down? Then you have an ignition power supply problem in the run position. Most to least probable, Bad balasit resistor, bad wiring/conection, Ignition switch, Ican't rember if there is an ignition relay on these or a seperate fuse for ignition run. Good Luck
I just fixed this same problem. A bad oil pressure switch. This switch when working correctly, turns off the fuel pump when oil pressure is not adequate. Ford no longer makes this switch so I put a connector on the two wires to close the circuit. I have a an oil pressure gauge so the switch really isn't necessary. You may want to replace the fule pump relay. I did that as well but it was not the problem.
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