I have a 2013 F-150, 3.5 ecoboost engine. I have read there are issues with certain valves in the heads that are causing problems because of carbon buildup...which eventually leads to serious problems with the engine. So I have a theory and wanted to run it past you people to critique what I am thinking.
1) I am thinking that because this is a DI engine, and for most every DI engine carbon buildup on the valves is a known problem.
2) I am thinking that the carbon buildup up is from the PCV system with oil vapor getting back into the heads and building up on the valves?
3) I am thinking that because this is a turbo engine that because of the boost more oil vapor is getting back into the heads which is causing this problem to be worse?
4) I think though that because I have used Mobil 1 since the first oil change that the problem should not be as bad as dino oil?
5) I am thinking that I cannot use any kind of a throttle body cleaner in fear of any carbon chunks that come off of the valves of getting to the Turbo...that and the cleaner possibly washing the lubrication from the turbo bearings?
6) I am thinking that an easy fix would be to install a catch can on the PCV system?
Ain't just you. Found something to cure the throttle lag because of the electronic throttle. It is called Sprint Booster...they should make this for the Vipers too!
that aint gonna hurt the turbo at all either. PCV "technology" is so old I am surprised no one has come up with a better isolated system that recirculates the oil caught and hgave just the filtered clean air return to the engine.
As to your "theory": you would need to pull the intake and trace the path that recirculated oil misted air would follow once it enters the intake. I expect you would see a pretty obvious path of oil deposit and certain valves being worse that others based on air flow path through the intake. then Id say you are pretty solid on your theory. then prove said theory you would need a fresh engine and run it with an AOS in line with the PCV valve and see if it is then free from valve contamination. Then you go to FORD and sell them your patented system and give me 25% for my assistance in the venture. I will PM you my off shore accnt number
Here's an example of just one valve at 8,000 miles (sorry about the poor quality, but you get the idea)
I'm at 20,000 miles today. In the next couple weeks I will take higher resolution pics and install water injection. I'll let you know if it cleans things up over time.
Installing a catch can will probably help. But there's still reverberation during a cold startup when the cams are phased to satisfy emissions that may contribute.
I'm not a super fan of gas DI yet. I feel the drawbacks still outweigh the benefits.
It is well documented the old gen Audi engines would loose a lot of hp after as little as 10k miles due to the build up, btw any fuel additive that says it will clean valves in a DI engine is complete bullshit. My dad gets the "treatment" on every oil change on is sho and I continually tell him he is pissing money down the drain.
Friend has an RS4 and had to do carbon cleaning 3 or 4x. I actually never understood that car, it didn't ride or handle near as well as a CTS-V and V would obliterate it in straight line yet the RS4 cost more and maintenance was ridiculous in general on that car. He still freaking has it almost 10 years later (bought new), problems and all lol, that thing has been more of a money pit then a boat.
Me and my neighbor tore down his V10 S6. The valves were so heavily caked with carbon, we ended up using a set of dental tools and the shop vac. It took the better part of the weekend. And this isn't just carbon film and eww gross, no, this shit was easily clogging the performance equal to losing two cylinders. After we cleaned it and tested it, that s6 ran like a fucking B E A S T.
Told the guy to install a set of catch cans ASAP. But, last I heard, he's been battling cooling issues with that car now. So, yeah. Audi S and RS cars are fucking epic. EPIIIIIC. unfortunately, I'd never own one. The constant maintenance to keep it it purring would drive me nuts.
But the new ones... oh god, not the plebeian S4s, but the new RS7 etc.... I could not believe how quick that car is, or how hard it launches, you just don't expect that from a car that big, fucking rocket ship. Make the old cars look like Civics in comparison.
Turbocharged fuel stratified injection (TFSI) denotes a type of forced-aspiration ("turbo") engine where the fuel is pressure-injected straight into the combustion chamber in such a way as to create a stratified charge.
Yep I've had a single incident with the condensation issue. But now that I'm aware of it it will likely never happen again as I know what to do to not have an incident lol.
Isn't the "fix" not a new intercooler per se, but just a plate to block off part of the air flow to it to reduce the efficiency of it and therefore make it not condense the water so much? And of course a reduction of hp too?
Just read most people are drilling a hole at the bottom on the intercooler for the water to drain. A 1/16" hole, with a screw and o-ring seems to be working in getting everything out. Every now and then remove the screw and let the CAC drain.
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