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Old 03-19-2016, 01:48 AM   #1
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Ford V10 engine slightly surging climbing mountains

On my last 2 trips with mountains to climb, I had an incident on each trip when in T/H and in 3rd gear. At around 2700-3400 there was slight surging in RPM. Only lasted until speed or gears changed. Nothing shown on the dash tach, Scangauge tach or trouble codes. When I tried to duplicate it today on the way home, I couldn't.
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Old 03-19-2016, 05:39 AM   #2
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I had something similar on my work pickup. 07 Ford F-150. Basically when I was going up hill under load, I would get a surging or hesitation feel. Even though it didn't throw a code, it basically just need a tune up, new plugs and wires. This was when I had about 150,000 miles on it. I currently have over 200,000 and it hasn't done it since.


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Old 03-19-2016, 09:15 AM   #3
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I had something similar on my work pickup. 07 Ford F-150. Basically when I was going up hill under load, I would get a surging or hesitation feel. Even though it didn't throw a code, it basically just need a tune up, new plugs and wires. This was when I had about 150,000 miles on it. I currently have over 200,000 and it hasn't done it since.


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Thanks, but this is a new MH, 6K on the odometer.
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Old 03-19-2016, 10:28 AM   #4
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Probably just the torque converter.


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Old 03-19-2016, 11:53 AM   #5
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On my V10 Class C I had surging problems, especially at city traffic speeds. Turned out there was a tech bulletin on it that one of the shift sensors (there were 6 or 7 total) was not telling the tranny when to shift. Replaced the sensor and fixed the problem. I bought the sensor on line and did the simple replacement myself. Check for tech bulletins (not safety recalls) with a Ford dealer.
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Old 03-19-2016, 11:54 AM   #6
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BTW, my unit at the time was a 2005 Coachman Leprechaun.
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Old 03-19-2016, 12:05 PM   #7
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Thanks, but this is a new MH, 6K on the odometer.
My 2015 does the exact same thing when climbing a mountain pass in lower gear. If you find a solution, please share. My local Ford dealer does not work on motorhomes, and the one that does is a major inconvenience to get to. I will need to bite the bullet and go at some point since I should get the oil changed soon!
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Old 03-19-2016, 01:01 PM   #8
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V10 surging

I have a 2015 FR3. We have pulled from sea level to 8000 ft with no problem, but my mechanic friend told me that these engines love to rev, so he recommended always using the tow/haul mode and let the motor spin.
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Old 03-19-2016, 01:52 PM   #9
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Try a different grade of fuel. Maybe you got a tank full of E15. That will certainly cause an issue!
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Old 03-19-2016, 04:26 PM   #10
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If you find there is no mechanical problem try 5star tune. The programming as it comes from Ford is not optimized for motor homes. After we installed it the trans shifted much better. It no longer jumps into over drive going over overpasses.
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Old 03-19-2016, 04:41 PM   #11
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We have a 2014 C with V-10. I have notice what I will call pulsing when trying to hold the pedal steady. I was thinking it may be due to road surfaces causing slight fluctuations in gas pedal pressure.
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Old 03-19-2016, 05:35 PM   #12
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V-10 Engine surging

Were you guys using T/H uphill or downhill when you mention the surging..I sat in on a seminar at Goshen this last year with the Ford factory rep. The main topic evolved into what T/H is used for by most of us, and what the factory says it's designed to do & how to use it...Several of us there thought T/H was to be used when towing, to keep the tranny from burning up in OD under the load & for pulling hills...according to the rep, T/H is for engine/tranny breaking going down grade..by turning it on (button out) and tapping the breaks, the tranny downshifts one gear, per tap, and holds it there, acting as a tranny/engine break...he told us, when we were asking about the high engine noise with the higher RPM, and he said not to worry, not the engine/tranny but the fan noise. According to him, you aren't gonna hurt it, that's what it's designed to do.....blew me away, didn't know that... All this said, could maybe the surging you guys experienced be a factor of the T/H mode being on and not allowing the tranny to shift itself???? Just questions guys, I'm really curious now....

Getting ready to start 4down my Edge behind my 2016 Sunseeker in a few weeks, and this is an aspect I for one, would appreciate you guys experience in this area...
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Old 03-19-2016, 07:02 PM   #13
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Were you guys using T/H uphill or downhill when you mention the surging..I sat in on a seminar at Goshen this last year with the Ford factory rep. The main topic evolved into what T/H is used for by most of us, and what the factory says it's designed to do & how to use it...Several of us there thought T/H was to be used when towing, to keep the tranny from burning up in OD under the load & for pulling hills...according to the rep, T/H is for engine/tranny breaking going down grade..by turning it on (button out) and tapping the breaks, the tranny downshifts one gear, per tap, and holds it there, acting as a tranny/engine break...he told us, when we were asking about the high engine noise with the higher RPM, and he said not to worry, not the engine/tranny but the fan noise. According to him, you aren't gonna hurt it, that's what it's designed to do.....blew me away, didn't know that... All this said, could maybe the surging you guys experienced be a factor of the T/H mode being on and not allowing the tranny to shift itself???? Just questions guys, I'm really curious now....

Getting ready to start 4down my Edge behind my 2016 Sunseeker in a few weeks, and this is an aspect I for one, would appreciate you guys experience in this area...
That's interesting as I was turning the T/H on and off. We left Yosemite Valley and climbed in T/H and when we started downgrade, I tapped the brake and coast for a while. As I came upon a curve where I needed to slow down a bit I would softly put on the brakes as hitting it too hard would cause it to drop a gear and whine like crazy. The only way to stop the whine was to turn off the T/H. Perhaps, I shouldn't be in T/H climbing as it could be preventing the transmission from shifting. I thought I read somewhere that T/H will let the transmission run cooler. I forgot to do that last week going to Death Valley and climbing from Panamint Valley over Towne Pass. 3/4 the way up I noticed the transmission temperature rose from 203 up to 231 degrees. I pulled into a turnout and turned on the T/H then let it cool down for 5 minutes. Cruised up and over with temp of 203. Coming up that grade caused the surging at one point.
Coming back from Yosemite, I used T/H and climbed the Grapevine with it floored and at one point I was doing 70 mph and 5,100 rpms. Not for very long as it shifted and dropped down to 4,300.
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Old 03-19-2016, 07:15 PM   #14
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Sagecoachdriver,

One suggestion was that the surging is due to the transmission not shifting properly. You can add a transmission gear ratio readout to your Scangauge. If you see the gear ratio wandering around it would be telling you that the transmission isn't shifting completely into gears. I don't recall, but you may also be able to see torque convertor lockup, which may not be locking and/or remaining locked.

As an aside, it seems odd that electronic transmission controls look at the gear ratio, but the controls watch the input versus output shaft speeds as the gears change to adjust how quickly and firmly to change, in order to maintain shift quality over its life, and to adjust for the operator's driving style and the service.
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Old 03-19-2016, 07:59 PM   #15
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I think it's me and I'm trying to drive it like my old Winnebago with the 4R100 transmission with O/D. It's not the same.
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Old 03-19-2016, 11:09 PM   #16
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Quote:
Getting ready to start 4down my Edge behind my 2016 Sunseeker in a few weeks, and this is an aspect I for one, would appreciate you guys experience in this area...
OT, but I'm towing my 2016 MKX (Edge based) 4-down behind my 2015 Forester 3051S right now and it's doing OK, not in TH, on the hills here in the Texas Hill Country.

It's our first trip with the brand new MKX, we had a Fiat 500 for a toad previously. Obviously the Fiat was a lot lighter.
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Old 03-20-2016, 06:52 AM   #17
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That's interesting as I was turning the T/H on and off. We left Yosemite Valley and climbed in T/H and when we started downgrade, I tapped the brake and coast for a while. As I came upon a curve where I needed to slow down a bit I would softly put on the brakes as hitting it too hard would cause it to drop a gear and whine like crazy. The only way to stop the whine was to turn off the T/H. Perhaps, I shouldn't be in T/H climbing as it could be preventing the transmission from shifting. I thought I read somewhere that T/H will let the transmission run cooler. I forgot to do that last week going to Death Valley and climbing from Panamint Valley over Towne Pass. 3/4 the way up I noticed the transmission temperature rose from 203 up to 231 degrees. I pulled into a turnout and turned on the T/H then let it cool down for 5 minutes. Cruised up and over with temp of 203. Coming up that grade caused the surging at one point.
Coming back from Yosemite, I used T/H and climbed the Grapevine with it floored and at one point I was doing 70 mph and 5,100 rpms. Not for very long as it shifted and dropped down to 4,300.
When we got our 2500TS last year, I read through the Ford manual on T/H mode. The manual stated that proceeding downhill in T/H mode, the transmission will downshift one gear each time the brakes are applied.

Not having access to the Ford manual, I checked on line. Sure enough, the Ford trans will downshift one gear every time the brakes are applied-all the way down to first gear. For the reason you just mentioned, it may be necessary to apply the brakes without another downshift. By touching the accelerator, the trans goes back to high gear and the sequence starts all over again.

The below video explains it.

http://www.bing.com/videos/search?q=...96&FORM=VRDGAR
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Old 03-20-2016, 10:16 AM   #18
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Custom tunes from 5 Star Tuning is the way to go. You will climb those mountains with no problem. It's like having a new engine & transmission.
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Old 03-20-2016, 10:59 AM   #19
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I have a squeal going from 3rd to 4th while towing and I took it to 3 ford dealers and they would not even look at it. Ford has sent out a bullitan out to all dealers saying this sound is a normal sound and that they will not be reimburst for even looking at the problem. I have been told that it is normal. I even took it to a state inspection station and they said that if it is nothing that they can look at either.
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Old 03-20-2016, 11:36 AM   #20
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Custom tunes from 5 Star Tuning is the way to go. You will climb those mountains with no problem. It's like having a new engine & transmission.
What is the approx cost for their tuning program? Do they send you a chip or something that you load into your Ford computer module or what?
Thanks
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