Has anyone with the rough idle issue tried running through a fuel system cleaner like chevron yet? Could simply be dirty injectors, I've noticed my idle improve greatly after using it. Ethanol tends to form a sticky buildup after awhile, which could be effecting the injectors and/or fuel flow at idle.
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The CAC produces moisture and it collects inside. Upon acceleration, the moisture gets passed through and blows out spark plugs. The only solution is to drill the weep hole in the CAC so all of the water and gunk drains out. Make sure you have plugs gapped to .028 and install asap. You may get 15k miles out of a set of plugs... Have to change often in order to feel confident the truck won't stutter on acceleration.I dont understand eating spark plugs within 8k miles, that doesn't seem right.
Where's the cac located?
I have a 12 ecoboost with an aFe intercooler, rx catch can, solo catless dp and five star 91oct tune. I get a rough idle on cold start pretty much until I drive it around a bit and get it warmed up but then after that the idle is much smother. Still not dead smooth but definitely smoother. I would like to get it perfect but yeah it kinda seems difficult to achieve going by some of the stuff I've been reading.Rough idle you say? Hmmmm more victims of ford I see. Mine did this... Ford could not fix it. 5* tune fixed it. The only rough idle I ever get now is from a cold start, then it quickly smooths out.
Ya you would think that being ford has had over 100 years of building vehicles it could get something as simple as a smooth idle out of an engine. It's seems lately ford seems to be in denial and does not want to admit there are issues with this engine platform. Nor do they seem to care as there are no real fixes for some of them.I feel bad for ecoboost owners. This stuff is unbelievable. The condensate in the CAC has never been solved by Ford. This gets sucked up and over time causes downstream effects (before it hydrolocks the engine). This is why folks are failing O2 sensors and cats. Ford will dupe alot of people...
Let's get the rough idle on the radar of your regional customer service manager (CSM), BLOWBYU. Send me a PM with your full name, best daytime phone number, VIN, current mileage, and servicing dealership. I'll have your CSM give you a call to discuss this further....I still have bad rough idle when cold start and my truck will sometimes idle rough out of the blue for a few seconds when hot.
Going to be taking it this week as I am at 33k right now and what this issue resolved 100 percent...