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Author Topic: Engine surging when in lower gear  (Read 471 times)

Greg E.

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Engine surging when in lower gear
« on: June 21, 2017, 08:25:36 AM »
 Hi everyone,
 I'm having an issue with our Winnie 27N model with the Ford Triton v10 engine. It seems that the unit acts like it is surging, Lunging, when running in a lower gear such as climbing hills. A difference of 200 rpms or so every other second while in that gear. I'm thinking dirty gas at one of our stops and the fuel filter may be clogged. Anyone run into a similar problem? Seemed ok before or didn't notice it. We just recently purchased this unit from a private owner and we are newbees to motor homes.
Thanks.

Greg

blw2

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Re: Engine surging when in lower gear
« Reply #1 on: June 21, 2017, 08:31:49 AM »
All I can say is that mine does the same thing...always has.
Brad (DW + 3 kids)
13 Thor Chateau 31L Class C on Ford E-450
'06 Silverado
'05 Rockwood Freedom 1910 (5-1/2 years)
former tent campers

kdbgoat

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Re: Engine surging when in lower gear
« Reply #2 on: June 21, 2017, 08:50:35 AM »
2016 F-450 chassis class C here. Mine does the same thing. I was thinking about asking the dealership about it, but will follow this thread first.
I know you believe you understand what you think I said,
But I am not sure you realize what you heard is not what I meant


2016 Leprechaun 319DS

Gary RV_Wizard

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Re: Engine surging when in lower gear
« Reply #3 on: June 21, 2017, 10:22:24 AM »
Could it just be shifting in/out of a lower gear? Or torque converter lock-up to no lock-up? 200 rpms sounds about right for that, and it would occur on moderate grades.
« Last Edit: June 21, 2017, 10:24:21 AM by Gary RV_Wizard »
Gary
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Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

kdbgoat

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Re: Engine surging when in lower gear
« Reply #4 on: June 21, 2017, 10:37:55 AM »
I really haven't payed enough attention to my tach when it does it, but it doesn't seem as if it is a shifting issue. I can't feel the surge, and it doesn't speed up or slow down any that I can feel in the seat of my pants, all I do is hear it. It really seems more of a harmonic type of thing, but goes away with the slightest lifting of the accelerator. 
I know you believe you understand what you think I said,
But I am not sure you realize what you heard is not what I meant


2016 Leprechaun 319DS

Greg E.

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Re: Engine surging when in lower gear
« Reply #5 on: June 21, 2017, 11:15:44 AM »
 Thanks guys. I also don't feel it is a shifting back and forth. It stays in the gear range, but a slight feel while it is doing it. I'll run this tank close to empty, and refill with Mobil. I swear to that brand with all my vehicles. If it still occurs, I'll get the fuel filter changed.It's not bad , just annoying and not being familiar  with motor homes, not sure it isn't normal. I'll keep you all posted on my results. Thanks for the feedback!!

Greg

jubileee

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Re: Engine surging when in lower gear
« Reply #6 on: June 21, 2017, 11:33:03 AM »
Probably doesn't apply to v10, but my 460 Ford had that same surge. Turned out to be ignition relay. Took me three years to figure it out. Finally got to where it would cause the tpms to reboot occasionally.

blw2

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Re: Engine surging when in lower gear
« Reply #7 on: June 21, 2017, 10:27:40 PM »
I was thinking about this thread driving the last leg of our trip.  I'd say mine isn't 200 RPM.... it's less than that.
definitely not shifting, and I agree with your comparison to a harmonic.
Just a wa wa wa pulsing to teh engine's scream....
I did pay really close attention to the tach when it was doing it.  I was accelerating up hill, and could see a very faint stutter in the needle as it climbed.... had to look close to see it.
Brad (DW + 3 kids)
13 Thor Chateau 31L Class C on Ford E-450
'06 Silverado
'05 Rockwood Freedom 1910 (5-1/2 years)
former tent campers

Greg E.

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  • Posts: 15
Re: Engine surging when in lower gear
« Reply #8 on: June 27, 2017, 08:22:03 AM »
 Brad,
 Yeah, that sounds like what I encountered. I ran it for about 20 miles this weekend and did not notice it as bad. I'm thinking my original thought that the gas might have been bad, but will continue to monitor it. Thanks for the feedback. Will keep posting results.

Greg

kdbgoat

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Re: Engine surging when in lower gear
« Reply #9 on: June 27, 2017, 08:32:17 AM »
Brad,
 Yeah, that sounds like what I encountered. I ran it for about 20 miles this weekend and did not notice it as bad. I'm thinking my original thought that the gas might have been bad, but will continue to monitor it. Thanks for the feedback. Will keep posting results.

Greg

I'm thinking the same thing. My generator wants to run like crap now too. I noticed it sometime after I filled up at a Loves near Hagerstown Md. I topped off at a station down the road from me when I get home. Just might have to add some Techron or something to try to clean up the systems after I take a road trip to run this stuff out as low as I dare to run it. Then refill with Exxon or another top tier gas.
I know you believe you understand what you think I said,
But I am not sure you realize what you heard is not what I meant


2016 Leprechaun 319DS

kdbgoat

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Re: Engine surging when in lower gear
« Reply #10 on: July 12, 2017, 12:10:49 PM »
Well, I haven't taken a road trip yet, but... I ran my genny for .3 hours unloaded last night to warm the engine in preparation to change the oil. I changed the oil, then ran it 2 hours under load as that was due for the month. The genny started up fine both runs and ran smooth as a baby's butt the whole time. I don't have an explanation for why it was running like crap when I ran it before. Just happy it runs smooth now.
I know you believe you understand what you think I said,
But I am not sure you realize what you heard is not what I meant


2016 Leprechaun 319DS

casualemt

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Re: Engine surging when in lower gear
« Reply #11 on: August 07, 2017, 11:26:17 PM »
FYI, I work on the 911 ambulances here on Whidbey Island, we try to replace 2 ambulances every 2 years.
For years we have used the 450 chassis with Diesel engines. 3 years ago the new rigs we got were 450's with gas V-10s. Both of the ambulances did the same thing yours does, especially on acceleration...very weird, and they both do it still today! Someone said it was the tranny learning your driving habits...I call bull on that one. Last year we got two more new ambulances with the v-10s, guess what? Smooth as silk, no surging at all...another obvious case of Ford selling a crappy product and then figuring out how to fix it after enough people complain! Just look at the v-10 itself, blowing manifolds, popping spark plugs out..after a couple of years they re engineered it, and they don't do it any more. Very powerful engine tho..seems to use about 30 to 40% more fuel than the diesels...there's another one from Ford, the 6.0 diesel what a nightmare! Just what you need in an ambulance, a motor that just quits running while going down the road to save someone in medical peril...
Long story short..it's not the fuel
Rich and Carol...
2005 Journey 36G 350, Deep Blue

Greg E.

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Re: Engine surging when in lower gear
« Reply #12 on: August 08, 2017, 01:19:23 PM »
 Thanks for sharing that. I thought I was the only one having this issue for a while. Sounds like it could be intermittent too. Hate to be the patient in one on the way to saving my life. Hope my plugs don't start popping out!

 

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