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Old 09-13-2015, 10:33 AM   #1
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84 Ford 460 in Cobra Motorhome fuel problem

My parents have a 1984 Ford Cobra motorhome with the 460 in it. It ran fine last time they used it. When we went to start it it turns over but will not start. I primed the card with a bit of gas and the engine ran till it burned it up then died. I can hear the pumps turn on and when i switch tanks nothing changes. I am not real familiar with this MH, could someone tell me where the filters are? I am not sure what else to check any help would be much appreciated.

Thaks

Rob
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Old 09-13-2015, 11:57 AM   #2
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Rob; how long has the coach been parked ?
Anything over 3 months the fuel in the tank could be too stale to run the engine.
Can you check for spray from the accelerator pump?
Can you loosen the fuel line to the carb and check for fuel to that point?
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Old 09-14-2015, 08:45 AM   #3
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It sat about 2 months, worked great last time out, my dad also put in fuel stablizer. I am not able to see into the carb to check for spray. I will try to get the line off at the carb and see if the gas is making it up that far, then I am going to start chasing down the filters and see what I can find. Is just so frustraiting when I can hear the pumps turn on, and if I add just a bit of gas to the carb it will start. Seems like something is plugged and not letting fuel get to the carb. They just had a new tank switch installed a couple months ago, so I guess I will have to make sure its letting gas through as well.


Thanks


Rob
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Old 09-18-2015, 02:11 PM   #4
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Some of the mid 80s 460 motors had a mechanical fuel pump also.Elecric just used to suppy mechanical one.


Could also be needle valve under carb float is stuck to seat because of evaporated gas(turns to sticky varnish).Try to fill carb threw vents and let sit awhile this may free up needle valve.


good luck dave
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Old 09-27-2015, 07:51 AM   #5
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So I checked out the fuel pumps and they both seemed to have gone bad. I can put a piece of line on them and drop in into a gas can and they will not pump. I dont know why they would both go out at the same time? They buto still look new, still have the NAPA sticker on them.


What would you recommend as a replacement pump?


Thanks


Rob
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Old 09-27-2015, 02:11 PM   #6
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Carter electric fuel pump: pn 180-p4070. $68.99 at jegs .
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Old 09-27-2015, 04:38 PM   #7
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Check the fuel filter also. Old tanks have a lot of crap in them. By 85 Ford use to get plugged frequently and I had to change it twice a year to be safe.
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