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Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 47945
Experience:  16 years experience
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Ford E450 Econoline Ford 450 chassis RV. Truck has a battery

Resolved Question:

Ford 450 chassis RV. Truck has a battery isolator switch which I turn off if the RV is gonna be unused a while. Turn on isolator switch, start, engine starts immediately, then barely runs at idle for 10-30 seconds. Acc pedal does nothing. Then idle picks up and everything wortks fine. ??
Submitted: 6 years ago.
Category: Ford
Expert:  Chris (aka- Moose) replied 6 years ago.

Hello, I'm Chris.
I will do my best to answer your question fast and accurate using the info you have provided. Thanks for visiting Just Answer.

 

vehicles have computers, and these computers forget all learned memory when there is no power. It takes up to 2 weeks of driving for the vehicle to relearn the best operating strategy and run optimum and operate correct. This is why it runs and acts odd for a little while after starting the vehicle back up from a disconnect. The better option would be to leave the power connected and use a trickle charger to maintain the batteries.

 

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Customer: replied 6 years ago.
Added a solar charger, and I leave the isolator switch on all the time now. But the problm persists. After sitting two weeks, the engine will turn over with gusto, crank almost immediately, then stumble and fuss for about 30 seconds. During this time, the foot pedal has no effect on the engine speed. Lots of dark smoke suggests it's running rich. After half a minute, it runs beautifully. Runs smooth on the road. Help!!