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mgfiest's avatar
mgfiest
Explorer
Jul 02, 2012

Reasoning for Motorhome to quit running

Hello,
I got a question... hope it can be answered.
I have a 1990 Glendale Class C, (F350 chassis).

I just did a long run from Ontario to Savannah GA.
All was good going down, no issues at all.

The problem was coming back. It was a very hot day. I left from Roanoke Rapids,NC and was suppose to finish in Bedford, PA. I did not make it. The MH quit running in a middle of an intersection in Breezewood, PA.

The engine was hot, was running AC all the way, pushed the poor beast up those mountains, so when I came to an idle state, it quit running. I called for a tow but being a friday and a very hot day, the interstate issues were more important than me, so I had to wait.. it was about 4hours and I thought.. let's see if it would start.. much to my relief it did. the question is WHY. I was sure my engine or trannie was toast. BTW.. the oil level was good, battery charge was correct, rad fluid was up.... only thing I could not check was the trannie fulid.

If I remember my old vehicles from days gone by, I am guessing the gas lines got overheated and evaporated the gas, so that I was not getting no fuel. BUT.. this is just a guess.

Hope someone can help me with this mystery. and... should I take this to a mechanic to see if I really did damage.

Thanks
  • j-d's avatar
    j-d
    Explorer II
    Only a guess, but it's based on the most common thing we hear about Fuel Injected Ford chassis. Failing In-Tank Electric Fuel Pump. At least I'll say In-Tank. For most of the last 20 years, the Fords have had only one pump and it's been in the tank. In the late 1980s, maybe a 1990 chassis, they had a pump in the tank and another in the driver side chassis rail.
    At a minimum, find the Fuel Filter and change it. Blow through a new one then your old one after the gas drains out and it dries. My guess is you'll experience a big difference. This Thread addresses changing the fuel filter in later model E-Series. EFI Fords have had similar filters since the 1980s. But a new filter will not restore a failing pump.
  • 460 Ford with fuel injection?

    Likely over heating of fuel and vapor lock. Lots of other possibles including intermittent ignition module failure due to heat, fuel pumps often behave in that fashion when about to die. A good tech will be able to use an oscilloscope to look at the current profile for the fuel pump which may point to a pump issue but these things are tough to diagnose if the problem is not manifest.

    If fuel injected the possibility of vapor lock is less than that of a carbureted system because the fuel pressure is higher and therefore the fuel vapor point is also higher.

    If you have not located the fuel cut-off intertia switch, now is the time to do so in case this happens on hitting a bump but will not be the issue in this case because it will not reset itself.