OP
jejeosborne
Veteran Member
Dup post
People are thinking too much about this. Years ago intercoolers came with weep holes. Here is a video I made with my most sensitive vacuum gauge.
YouTube Link: https://www.youtube.com/watch?v=hEArZzx064w
The Result: at idle there is insufficient volume to develop any notable pressure. However, the big idea is if a 1/16" weep hole drilled at the lower left front corner of the intercooler to solve the misfire issue ever draws vacuum, and it does not. As a result, I wouldn't worry about a weep hole at the bottom of the intercooler unless one is crossing a flooded road or doing water crossings. In those conditions, a nipple should be installed, and a breather line popped on that vents at a higher place.
It may be psychological but with my hole plugged, the truck seems more responsive today after plugging the hole yesterday. Again, it could be my brain messing with me.
I would recommend drilling a 1/32 hole after seeing the volume of air that came out of mine with not much load on the engine. I agree that vacuum doesn't exist at the intercooler but ambient pressure does. I am going to put a 1/8" barbed nipple on mine so I can put a section of fuel line on it with a small check valve from tower hobbies used for RC planes. I'm debating on a rotary valve as well or just vent with a 1/32 hole. It would be easy enough to route the fuel line thru the cab and back out so the valve could be inside. Still pondering.
Interesting. I can't seem to understand why this truck has an issue with moisture in the intercooler as I have never run into this on the other trucks and equipment I have run with an intercooler. Can't see how being gasoline would make a difference as this is just air that has been run through a turbo when it's inside the intercooler.
Just a thought to add to the mix here. On my regularly aspirated GM engine, I installed a oil trap "catch can" system on it. It is amazing the amount of oil and moisture that flows thru that PCV line back to the intake. On heavy commercial diesels, once the EPA demanded closed crankcase ventilation systems on them, the OEM's installed, at the factory, oil and moisture trap filtration systems on them to address similar issues as is being discussed here.
Have no experience with the Ecoboost engines, but it causes me to wonder, if an owner were to put a filtration system on the positive PCV line, if it wouldn't also trap the oil and moisture that would make it to the CAC (intercooler as some call it). Just a thought. No idea where the PCV hose gets introduced to the intake on them. On a Jeep Liberty Diesel I had, it was introduced into the intake tube just before the turbo. Man, when that turbo spooled up, it would draw a lot of oil and moisture out of the crankcase. I put a trap on it within the first 1000 miles I owned it. Never had near the problems everyone else had. Might be an option for folks here to consider.
Just a thought to add to the mix here. On my regularly aspirated GM engine, I installed a oil trap "catch can" system on it. It is amazing the amount of oil and moisture that flows thru that PCV line back to the intake. On heavy commercial diesels, once the EPA demanded closed crankcase ventilation systems on them, the OEM's installed, at the factory, oil and moisture trap filtration systems on them to address similar issues as is being discussed here.
Have no experience with the Ecoboost engines, but it causes me to wonder, if an owner were to put a filtration system on the positive PCV line, if it wouldn't also trap the oil and moisture that would make it to the CAC (intercooler as some call it). Just a thought. No idea where the PCV hose gets introduced to the intake on them. On a Jeep Liberty Diesel I had, it was introduced into the intake tube just before the turbo. Man, when that turbo spooled up, it would draw a lot of oil and moisture out of the crankcase. I put a trap on it within the first 1000 miles I owned it. Never had near the problems everyone else had. Might be an option for folks here to consider.
For the few of you that have actually experienced the misfire, have you done the updated tsb from ford? There were 2. One required a shield be put on the top portion of the ic, the second tsb had you remove that one and stick one on the bottom. It's supposedly working better. And now there is a new design ic, different part number, doesn't require any mods but I haven't seen one in my shop yet.
Someone mentioned the egr causing some issue. I can't vouch for every single model, but I haven't had one yet that had an egr.
People are confused about this issue. I think some aren't realizing that in the right conditions, as the op stated, condensation is being created inside the intercooler. At the right dew point, this water is always there. When it becomes a problem is if you are cruising and accelerating in just such a way to allow it to build up, then blast it into the motor all at once. I would venture to guess this is happening with diesels as well. But they have a much better chance of passing it thru, plus are noisy enough that you never know it. And the third reason brings me to my next point, and a big difference in intercoolers. If you look at most (not all) big diesel intercoolers, the inlet and outlet ports are towards the middle. On the eb, they are at the very bottom. In my un-engineering-degreed opinion, ford might go a long way by just flipping this thing around to move the air in and out at the top and let it boil or vaporize out as the conditions allow.
And somebody also had allot of misfire and cracked plug problems. There's a tsb on this as well. If you've already replaced the plugs, make sure they were the right part number as indicated in the tsb. With boost from twin turbos and 2500 psi of fuel, the wrong plugs will not run this engine correctly