Turtle n Peeps wrote:
ShinerBock wrote:
Turtle n Peeps wrote:
Ok, have it your way; here is 17 pages worth of 3.5 carbon valve problems on the 3.5 Ecoboost
More reading.
There's more........A lot more.......
BTW, EGR has nothing to do with DI carbon issues. (Or next to nothing for those of you that want to split hairs.)
I never said there is zero carbon buildup on non EGR DI engines. Even port injected valves will have some carbon buildup on them over time. I said it is not a major issue or will cause engine failure like the DI engines with EGR. The soot from the exhaust gasses being re-introduced into the intake on a direct injected engine compounds this problem making it a major engine issue leading to engine failure.
As of today, have never heard of carbon buildup causing engine failures on a 3.5L Ecoboost or any other sluggish condition that a few minutes of "driving it like you stole it" won't fix like on port injected engines.
The engine won't fail. What will happen is your engine starts loosing power, going to be hard to start, and gets poor fuel economy from carbon build-up.
Bore scope of an Ecoboost engine with 15K on it.
PUT.com wrote:
The reality is that while the new EcoBoost is an impressive engine, carbon buildup will happen and for now, the only fix seems to be replacing the cylinder heads.
The OP had a turbo go out x2. My point to the OP is this: This engine has some congenital problems; BUT turbo's isn't one of them UNLESS someone has be dumping chemicals in the intake trying to clean up the valve carbon problems. If he or anybody else has been doing this your likely to have turbo problems.
All DI engines have this problem. It's not exclusive to the Ecoboost. It has nothing to do with EGR. (I don't even know why EGR was brought up?) It has everything to do with valve overlap and flow reversion.
Troy is right. Ford is going to solve this whole debacle once and for all with the 17 model. How? By designing a whole new fuel system with a double set of injectors. This is the proper way of fixing the problem. This is a first with DI as far as I know? The tuners are going to go ape shirt over this 2 injector deal. With a double set of injectors they now will be able to run duel fuel, E85 or even straight meth in this engine. They are going to love this whole deal!
I suggested this way to fix this problem way back when on this very forum. I wonder if I should file for compensation from Ford for my recommendation? :B
If that were the case, then why don't you see it all of the forums of people complaining about having to replace heads? Surely with the million Ecoboost engines sold in F150s one would think that if this were a major issue then there would be some kind Consumer Report article or some major lawsuit, but there is nothing. Because it is not as big of a deal as some would like to make it out to be.
I work for the largest heavy and medium duty truck dealership in North America. We have 180 dealership location spanning many OE brands. At each of these locations we have parts delivery and salesman take home trucks that are all F150 Ecoboost trucks accept for a few 2010 5.4L. Our policy is to run these trucks to 200k miles and sale them at the auction. The corporate fleet manager who is in charge of all of our company equipment and there repairs is a few offices down from me. Being that we both work friends and are truck enthusiasts, we talk about these trucks and others quit a bit. Out of the 200+ Ecoboost trucks in our fleet(most with 150k+ miles), not one has had a major repair like head replacement or needing a carbon clean. A few have had a turbo replacement, but it had nothing to do with carbon build up.
So as far as people making it out to be like it is some big major problem, I ain't buying it. I would have to ask what is their real world experience on this besides a few forum posts. Usually it is ZERO. I personally drove on of those 2012 company trucks mentioned above for all of it's 170K miles in my last sales position, and not one head replacement, not one turbo replacement, and not one inkling of power loss. My personal 2011 F150 Ecoboost was the same way when it I traded it in at 110k for a bigger truck.
Also, I did not say EGR causes this issue. I said it compounds it. The reason for the carbon buildup is due to oil on the valve not being washed away by fuel. (Again, even port injected vavles get carbon build up). With EGR, exhaust soot is added to the mix and sticks to the oil causing a little buildup to become major buildup over time. This is why you see so many forum horror stories (not just a few) of carbon buildup casuing major engine failure in direct injected engines with an EGR. Those without an EGR, not so much. You don't hear much about thise happening to the non-EGR Eciboost like the 3.5L and 2.7L or even any of the GM Ecotec engines like the 4.6L, 5.3L, and 6.2L found in their trucks. Why? Because it is not a major issue since they don't have an EGR to make it one.
