I have a 2019 Minnie Winnie, V-10 Ford. It has 10k miles on it. It idles at 1,000 rpms but it fluctuates between 1,000 and 1,200 every 5 seconds or so. Now and then it seams to stumble at an idle. It also seams to surge when pulling a long hill at about 3,500. Is this normal? Or should I take it to a shop? Thanks, Allen
I have the exact same motorhome, and mine does not do that. It sounds like a sensor has become unplugged. I would get an engine control computer code reading, or take it into a Ford Dealership which works on motorhomes. That sort of problem is covered by Ford for three years.
Please let us know what you find out.
2019 Minnie Winnie 22M on an E-450 frame
Location: Sanialabad, Peoples Republik of Canuckistan
Could be a lot of things.
Bad fuel? Might have clogged up the fuel filter?
Bad plug wires or plug capacitors? Can you see or hear any arcing when the idle fluctuates?
Or what Eagle5 suggested. Somethings not connected right.
Has it set any CELs?
Get it diagnosed, as suggested, before throwing money at our guesses.