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<<<8.1 litre, in a Workhorse. Driving along just fine at 60mph..engine light comes on and warning says "Low Engine Power"...struggle over to a turn out shut it off, check fluids, all OK, restart every thing is OK..???Wadda..? Few days later in rain step on gas up hill engine coughs spits surges..let off gas and all OK...Wadda..?>>>
We have a Ford V10. We were loosing power when it rained. The first time was about 3 years ago when we were near Denver going up a hill and hit a downpour. The next time was last fall when we left NH heading for work in FL. It was raining, going up a hill when we lost power. We struggled along staying on flat roads as much as possible since the problem did not show itself then. After spending the night in a parking lot and running out of flat road, calling 'mechanics' in the FMCA membership book, we finally called Camping World back in Wilsonville, OR. Art spoke with the guy we dealt with there all the time and it came up with the problem which we had forgotten about.
Ford knows there is this design problem with their big engine: water sprays up off the road into the air filter. Mechanics even recommend you build a 'box' under it to help prevent this but we have not figured out how to do it.
When Art opened the air filter, sure enough the filter was full of water. He dumped it out, shook water out of the filter as best he could, then we were able to go. We made it from MA down to VA to my brothers praying for no more rain. When we were going thru Hartford, CA it was raining. Once we got thru town we found a shopping mall where we spent the night. The next day we made it to VA where Art bought a new filter and threw the wet one away.
This sounds like your problem. We try to avoid driving in rain, especially heavy rain although regular rain can cause the problem too.
Good luck
We have a Ford V10. We were loosing power when it rained. The first time was about 3 years ago when we were near Denver going up a hill and hit a downpour. The next time was last fall when we left NH heading for work in FL. It was raining, going up a hill when we lost power. We struggled along staying on flat roads as much as possible since the problem did not show itself then. After spending the night in a parking lot and running out of flat road, calling 'mechanics' in the FMCA membership book, we finally called Camping World back in Wilsonville, OR. Art spoke with the guy we dealt with there all the time and it came up with the problem which we had forgotten about.
Ford knows there is this design problem with their big engine: water sprays up off the road into the air filter. Mechanics even recommend you build a 'box' under it to help prevent this but we have not figured out how to do it.
When Art opened the air filter, sure enough the filter was full of water. He dumped it out, shook water out of the filter as best he could, then we were able to go. We made it from MA down to VA to my brothers praying for no more rain. When we were going thru Hartford, CA it was raining. Once we got thru town we found a shopping mall where we spent the night. The next day we made it to VA where Art bought a new filter and threw the wet one away.
This sounds like your problem. We try to avoid driving in rain, especially heavy rain although regular rain can cause the problem too.
Good luck
