Big*Red

[QUOTE=acdii;4548909]Get a scan tool, and record the codes when it happens. A picture from a phone is all you need. Take it in and present the codes, which will usually be a P030x, the x being the cylinder that misfired.

What your describing is that they applied the TSB without cleaning out the Intercooler. Putting the parts on will only resolve the issue once the IC is clean, it wont prevent it from happening if there is still gunk in it.

I now have 27500+ on my 2014 and have only had it happen one time before the 10K mark, since then I have run a 5* tune on it and have not had a repeat. This spring though I do plan to take the IC off and inspect it internally for oil and water. If I do see any, then I will be installing a catch can.

Please note...the IC is on the opposite side of combustion than the PCV and are two seperate issues, but both can affect the combustion chamber where they merge...one from the IC and the other from the PCV return...

Bigfoot02

Using top tier gas helped mine - google top tier gas

Chevron Texhron helped mine

Bigfoot02

wrong, I jumped the gun. in now for new plugs

misfired to set CEL safe mode, restarted all ok, but doing plugs this time

SPF534 .35

acdii

Um, actually I think you are looking at this wrong. PCV works off vacuum, which is before the turbos, the IC is after the turbos and before the intake manifold. Any oil in the blowby will be sucked up by the PCV prior to entering the turbos, then compressed and blown into the Intercooler. Once it is past the turbos it is no longer in a vacuum, but under pressure, which would make PCV ineffective.

This now makes me wonder, if it is indeed oil in the blowby gasses being drawn in by PCV, wouldn't the turbos get oil on them? Has anyone looked?

I think I will hook up a scangauge and see if there is a vacuum setting in addition to the boost pressure. Almost positive there is little to no vacuum on the intake side past the turbos except at idle. From prior readings when I first tuned it, there was always positive pressure while cruising, just under 1 PSI, which jumped to 13 PSI when I hammered on it.

Bigfoot02

Plugs checked by Independent Mechanic - said two showed carbon tracking.

New plugs have it running great. Don't know how long it will last, but based on these looks like every 40-50k miles this Engine may need plugs, unless the SPF534 is the real long term answer

phillippeterson

Hi all,

Just found this thread. Our 2011 3.5 Ecoboost will shudder and hesitate from a start, AND will do the same at higher speeds when trying to pass.

All coil packs were replaced a year ago.

Just found this thread, and can't read all 322 pages.

What do I need to know?

Thanks for your help, Nancy

Big*Red

Hi Nancy,

This is basically the problem..

Ford chose to use a standard PCV system on a twin turbo engine, and when the compressed air, water, blowby, and oil from the engine pictured above is recycled into the intake plenum this stuff goes back through the injectors and causes misfires (which exacerbates the blow by problem with raw fuel) and studdering...

I resolved, at least, my issue with a "catch can".

http://oilcatchcan.com/

acdii

It doesn't go through the injectors, thats misleading. It gets ingested by a cylinder or two which extinguishes the ignition, and that is what dumps the raw fuel in, and causes the misfires until the spark plug can catch up and start burning the fuel again.

With that said, that much fluid getting sucked into a cylinder could also cause some serious damage if it all goes into one. I studied the PCV system and it is all pre-turbo(otherwise you would have positive pressure post turbo) so all that crap in that jar will accumulate in the intercooler, and when you go wide open throttle it can get blown in by the turbos and cause the misfires. Had it happen one time in my 2014, new immediately what it was but kept the hammer down and it did clear up. Hasn't happened since, but then again, have not driven in that type or weather since either, days on end of rain, very humid air, and cool temps, which all lead up to a lot of water condensing in the IC.

Roughneck12

I drilled a tiny hole in the IC and could not believe how much liquid came out.
I had a misfire on a tune and it went away after I put the stock tune back on. Changed the plugs and found a little carbon tracking on the one cal that a misfire code came up on.

Gaps were all over and the plugs had a lot of black crap which I assume is carbon.

Speedfreak400

I wouildn't want that s hit blowing under my truck. Seems like some type of valve and container could be delvelped to handle this.