We are looking at a 1991, 33', 460 Ford that the owner is having an electrical problem.
The engine will not shut off after running approx. 2 hours or when it gets hot. It forces him to remove the wire from the coil to shut the engine off. You also need to remove the battery cable because if not, it will drain the house battery and engine battery.
He also has the coach set up that when it is stored he plugs it into 110 volt, it charges the coach battery as well as the engine battery. When you let the coach cool off overnight, it will start fine the next day and shut off okay, until you let it run approx. two hours and it gets hot, then it will not shut off with the ignition. Okay...any guess as to what this might be?

[This message has been edited by whamer (edited July 26, 2004).]

I think this is why they used to advertise "Nine out of ten Fords are still running."

Is it carb or fuel injection?

Does leaving it in gear with the dash air on help? Both put a load on the engine.

Does it idle high?

To answer Bill H, it is carborator. When we looked at it, the dash air was on and it idles smooth, not a high idle, however it was a cool rainy day amd it did take several trys to get it to start.
The RV repair place is starting at the begining. They have serviced this coach all of its life. They have not cut wires yet, but it has been in for repair for over a month (on again, off again problem). My husband thinks it may have something to do with the coach batteries being over riden for the storage arangement with the 110 plug in, or a module or relay switch that expand when it gets hot.
This coach has not been used hard, it only has 29,000 miles and has been stored inside for all of it life until the last six month. Any insight on this would be helpful. We can't buy it until it runs correctly...or at least that is what the owner tells us.

This sounds just like my ignition switch problem. It gets hot from bad contacts and sticks on. We were filling the gas tank when I first noticed that even though I'd turned the key off the engine was still running. I still don't know if I can just take all the screws out to lift the dash out and access the switch. You can't get at it from the front on our "87 P-30.
Cheers, John

I have a 460 gas job in my 1991 33 footer Barth to. It is Multiport Fuel Injected. The ignition relay on mine is mounted under the dash. It stuck once and caused the vehicle to stay running. I disconnected it and replaced it. The parts house listed it as a ignition relay for a pickup truck.

Try disconnectiong the wiring harness under the dash going to the key switch the next time it happens. It it shuts off then replace the key switch. I do suspect however that it would be like mine and be an ignition relay.

------------------
http://www.truckroadservice.com/