Hi all!!I have some power issues. 2010 e450 class c with the v10 and 90,000 Kms. A couple of times in the past the engine has disliked aggressive acceleration and seems to kick into safe mode. This has happened when I am merging onto the highway and holding it wide open to get up to speed. It seems to drop from producing 300hp to about 200hp!! However, it’s only happened a couple times and if I pull over shut it off and restart it is all good again. This only happened 3-5 times over 3 years. Recently, we did a 3000km trip around bc and on our way home, it started to act up but would not get better. We stopped for a little break, it was running like a champ and then hit the road and it “detuned” itself. Tried the shut off and restart and it would be good until I hit the first hill and as soon as I pull hard on it it detunes again. As long as I can keep it in high gear it will pull hard. As soon as it downshifts and the revs pop up to 3500 it will pull hard for a couple seconds and then you can feel it drop power. And then will not smarten up for 10km or so. It also wouldn’t provide any engine breaking coming down hill. The tranny would downshift but it would just go faster on hills that the engine would normally hold the desired speed. Motor sounds great. Not using oil. Idles smooth and smooth at 4500 rpm. Not overheating. Tranny shifts good. No codes Any ideas? I am going to do a air and fuel filter. Thanks.

I had the same happen to mine. Changed the coil packs and plugs, a was good after that. I had 178 km at that time, traded it shorty after that.

One possible problem could be the fuel filter being partially clogged and as you accelerate the increase in gas cannot make it through the filter. Always start with the simplest solution first.

One very simple thing you want to inspect for.....Remove the oval air filter tube from the front plastic shroud area and inspect the hole it attaches in to. That hole should be free and clear of black plastic. The shroud itself has a plastic flap that if the shroud was removed and flap not position properly when being re-installed, there is a serious air flow obstruction.I don't recall what year it was, but some time after 2007, Ford had a recall on this very thing. During that model year for a number of months, someone on the Ford assembly line was mounting the black front shroud with the flap not folded back properly, causing that air intake obstruction. Every E-series was recalled and inspected to make sure the flap was folded back during assembly.With our 2007 E350, we ended up with a large bird plastered on our radiator. I removed the shroud trying to gain better access and sure enough, I had to be mindful of that flap.I imagine the obstruction would affect high-demand acceleration.

tobydad wrote:One possible problem could be the fuel filter being partially clogged and as you accelerate the increase in gas cannot make it through the filter. Always start with the simplest solution first.Possible fuel pump issue too......along with lots of other things.Should have a code reader connected. There may be trouble codes set that don't light any warning lights.Outside wild guess: the rev limiter is malfunctioning and cutting off at too low an engine speed.P.S. Actually "flooring" the gas pedal might not be a good thing to do, just in general. Try not pushing it quite that far.

I have 12 winnebago, but also had fuel pump failure last year. Yours kinda sounds the same except after a while mine would not start. Pulled codes with none to be found, ended up at a shop on 4th july weekend. Could not get codes even with the ford scanner. Anyhow finally replaced the fuel pump relay (after the fuel pump, tps couple of other things) and all was well.Yes you could be due a tuneup, but see if you can get the relay tested or just replace as they are not that expensive. A lot cheaper than trying to R&R fuel pump. I think at ford they were like $65 US same at Oriellys. Autozone was $200+!

Ford v10 loses power | Good Sam Community

pnichols
Explorer II
Jul 13, 2018
Amazing it is.

I wonder "If something is too good to be true, it probably isn't" applies here. It's getting so one sometimes probably shouldn't even trust design engineers anymore.

Perhaps that filter technology - whatever it is - could be applied to my well water filter, my motorhome's water filter, and my backpacking water filter. Or at the very least, have that filter technology extended to us older Ford chassis motorhome owners' external fuel filter replacements so that we could switch to it and never have to replace it again.

Personally, I'd MUCH RATHER have the Ford engineers switch to double fuel pumps in the tank for reliability redundancy so that when one fails, a dash warning light comes on that one of the fuel pumps has failed and you're now depending on only one of the two fuel pumps. I guess that right along with double in-tank fuel pumps should be separate relays for each fuel pump.

On RV trips a failed fuel pump can be very disruptive, serious, and/or dangerous: i.e. Failure on a busy roadway/highway with maybe no shoulder or no cell service, or failure out in the middle of nowhere when boondock camping where maybe you can't get a tow or no cell service, or failure in a small enough town where they can't/won't drop fuel tanks or where you have to find a place to stay while waiting for parts and tank dropping.

I hope whoever invented in-tank fuel pumps is sleeping well nights. :M and :h
Sam_Spade
Explorer
Jul 13, 2018
j-d wrote:
Amazing.
***
FUEL FILTER
Your vehicle is equipped with a lifetime fuel filter that is integrated with the fuel tank. Regular maintenance or replacement is not needed.
***

This is not something new.
I had a 1961 Buick with a fuel "filter" in the tank.
j-d
Explorer II
Jul 13, 2018
Amazing. I went to Ford.com and found this in Owner Manual for 2013 E-Series:
***
FUEL FILTER
Your vehicle is equipped with a lifetime fuel filter that is integrated with the fuel tank. Regular maintenance or replacement is not needed.
***
vjstangelo
Explorer
Jul 13, 2018
Try changing the air filter and cleaning the MAF sensor just downstream of the air filter. MAF cleaner can be bought at Auto Zone or the like. Also make sure the electrical connector on the MAF sensor has not become disconnected.
Hank85713
Explorer
Jul 13, 2018
Magic I guess, but the wifes honda does not have a filter either. Guess its the screen that is in the tank.
pnichols
Explorer II
Jul 12, 2018
Then how does the gas get filtered?
Hank85713
Explorer
Jul 11, 2018
on my 2012 was going to change the filter last year when fuel pump went out. NO filter external to tank. Places show one but none there in actuality.
pnichols
Explorer II
Jul 11, 2018
Redram99 wrote:
There is no external fuel filter on the 2011.
It’s in the tank.

The fuel pump is in the tank.

There had better be an external fuel filter somewhere outside the tank so that it can be changed periodically.
blownstang01
Explorer
Jul 11, 2018
Redram99 wrote:
Bad news — No fuel filter!!! Go figure.

Good news. I changed air filter, cleaned maf and did a computer reset.

Took it for a good run and pulled a couple long hills. Problem didn’t resurface.

Only has 1/4 tank of fuel in it(trying to exacerbate the fuel pump if that’s the issue)

Actually ran better than it has for a while. Air filter didn’t look dirty but they never do!

Are you absolutely sure there is no external fuel filter ?? I just serviced a friends 2012 Winnebago class C and it has the exact same fuel filter in the exact same spot as my 2008. All the parts lookups I just checked show the same filter ford has used for years for that year. It would be on the inside frame rail like right under the drivers feet. And this whole problem does sound like it could be a plugged filter. My friends was bought used, so maybe an external filter was added, but weird. Good Luck
Redram99
Explorer
Jul 11, 2018
There is no external fuel filter on the 2011.
It’s in the tank.

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