1978 Ford 460 RV wont start
sorry bout the pic its really big and somehow it flipped itself but thats the fuel pump right? the 2 terminals on bottom one say pos other say neg. the tank itself is in a housing but i think its one big tank but could be 2 ill get under it and post more pics soon for you guys thanks
The pix is fine. If the vehicle sat for a lengthy period of time the pump could be questionable. When you turned the key on you most likely should have power to that + terminal. If not you might just try a piece of wire from battery + and touch it to the + term of the pump. If it is a fuel supply pump , one hose should come from the gas tank and the other should go to a filter and then up to the carburetor. Don't forget to clean the ground (-) terminal at that pump. Let us know what you find. Thanks.
You would not use actual jumper cables , they are not necessary and are too heavy.
A length of regular 16 gauge wire will do. To give you an idea , jumper cables are 4 gauge or larger. The higher the # wire, the smaller the wire. Same size as what goes to the component now.
A length of regular 16 gauge wire will do. To give you an idea , jumper cables are 4 gauge or larger. The higher the # wire, the smaller the wire. Same size as what goes to the component now.
Yep, that's an electric fuel pump.
Hope this all makes sense...
Being you have a carburetor, that will be a low pressure pump. They normally put out about 4.5-9 PSI with 7 PSI being the normal range. I would disconnect the input line to see if you have fuel there. If not, blow in it towards the tank to ensure that part is not blocked with anything. Then reconnect. Then disconnect the output line from the pump and carb. Blow thru that line to ensure it is clear. Then put on a length of hose on the output side of the fuel pump to a catch can. Then apply voltage to the pump from a stand-alone battery. 14 ga. jumper wires will be large enough for testing, just fuse the + lead. If nothing happens, tap on the side of the pump with the plastic handle of a screw driver. If still nothing, then I would say that a new pump is in order. Holley makes then for their carbs.
Hope this all makes sense...
Being you have a carburetor, that will be a low pressure pump. They normally put out about 4.5-9 PSI with 7 PSI being the normal range. I would disconnect the input line to see if you have fuel there. If not, blow in it towards the tank to ensure that part is not blocked with anything. Then reconnect. Then disconnect the output line from the pump and carb. Blow thru that line to ensure it is clear. Then put on a length of hose on the output side of the fuel pump to a catch can. Then apply voltage to the pump from a stand-alone battery. 14 ga. jumper wires will be large enough for testing, just fuse the + lead. If nothing happens, tap on the side of the pump with the plastic handle of a screw driver. If still nothing, then I would say that a new pump is in order. Holley makes then for their carbs.
Yep, that's an electric fuel pump.
Hope this all makes sense...
Being you have a carburetor, that will be a low pressure pump. They normally put out about 4.5-9 PSI with 7 PSI being the normal range. I would disconnect the input line to see if you have fuel there. If not, blow in it towards the tank to ensure that part is not blocked with anything. Then reconnect. Then disconnect the output line from the pump and carb. Blow thru that line to ensure it is clear. Then put on a length of hose on the output side of the fuel pump to a catch can. Then apply voltage to the pump from a stand-alone battery. 14 ga. jumper wires will be large enough for testing, just fuse the + lead. If nothing happens, tap on the side of the pump with the plastic handle of a screw driver. If still nothing, then I would say that a new pump is in order. Holley makes then for their carbs.
Hope this all makes sense...
Being you have a carburetor, that will be a low pressure pump. They normally put out about 4.5-9 PSI with 7 PSI being the normal range. I would disconnect the input line to see if you have fuel there. If not, blow in it towards the tank to ensure that part is not blocked with anything. Then reconnect. Then disconnect the output line from the pump and carb. Blow thru that line to ensure it is clear. Then put on a length of hose on the output side of the fuel pump to a catch can. Then apply voltage to the pump from a stand-alone battery. 14 ga. jumper wires will be large enough for testing, just fuse the + lead. If nothing happens, tap on the side of the pump with the plastic handle of a screw driver. If still nothing, then I would say that a new pump is in order. Holley makes then for their carbs.
OK so what i did. went out there. the wire from battery gave no power with just ran from positive to pump positive terminal. so i hooked up battery charger and it made it run and there was fuel going to the carb. i ran it as i tried to start it seems i wasnt getting enough power as thats a problem as well. i have 2 good batteries and even so i had jumper cable from my truck hooked to one battery and my power station hooked to the other RV battery. It cranks but the power trickles away. I know my starter teeth are a little eroded when i had it tested it still worked but the teeth had wear. I decided not to replace yet.
So the pump works then right. but it kept running. it didnt just prime for 3 seconds because it was hooked to a constant power source.
Im pretty sure i have one tank. i followed the lines one fuel line from back of tank runs to the generator which doesnt work either btw. and the front of the tank line runs to the fuel pump. i have fuel in all lines to pump.
The power wire that connects to the positive terminal on the pump followed all the way up to a panel next to my fuses under drivers dash. there is a switch that says on/off and another smaller switch next to it. i have no idea what these switches are for.
i did notice a fuse blown a little tube. the spot says radio but i will try to find a replacement and see what that does idk what else to do so please help me guys. im so frustrated and im not even sure im using my multimeter right. once i flipped that switch i did get a reading from positive to positive wire for pumps terminal and neg prob to neg pump wire and i got a reading of .02 on DC. wasnt doing that before im pretty sure.
So now i dont know what to do????
So the pump works then right. but it kept running. it didnt just prime for 3 seconds because it was hooked to a constant power source.
Im pretty sure i have one tank. i followed the lines one fuel line from back of tank runs to the generator which doesnt work either btw. and the front of the tank line runs to the fuel pump. i have fuel in all lines to pump.
The power wire that connects to the positive terminal on the pump followed all the way up to a panel next to my fuses under drivers dash. there is a switch that says on/off and another smaller switch next to it. i have no idea what these switches are for.
i did notice a fuse blown a little tube. the spot says radio but i will try to find a replacement and see what that does idk what else to do so please help me guys. im so frustrated and im not even sure im using my multimeter right. once i flipped that switch i did get a reading from positive to positive wire for pumps terminal and neg prob to neg pump wire and i got a reading of .02 on DC. wasnt doing that before im pretty sure.
So now i dont know what to do????
Sorry you felt abandoned, but speaking for myself, it's just common courtesy to have as many folks offer suggestions without trying to "Run the show". Many times we wait to give other folks a chance to offer their suggestions and maybe we waited too long.
Thanks for the update . If you care to share the method with us, how did you determine it was the coil?
Thanks for the update . If you care to share the method with us, how did you determine it was the coil?


