Before I start, let me say that I am just reporting my findings, not trying to stir up any controversy. I received my truck on October 31, 2012. It is a 2013 KR F150 with the Ecoboost 4x4 3.55 Rear End. I became a part of the shudder family back in December. I took my truck to the service department on monday for this issue and the double grab door handle. They kept my truck overnight and I received it back yesterday. Here is what I was told happened by the Service manager.
"Condensation from the intercooler moved to the engine. It fowled out the #5 spark plug causing the #5 coil to fail. This intend caused the engine to misfire. With the engine misfireing it caused the left side catalyst (Cat Converter) to fail. This was all replaced according to TSB 12-11-15. The TSB released in September only replaced the shield. TSB 12-11-15 is a completely new redesigned intercooler."
I can get the code off of it next time I drive. The truck feels the same, didnt notice much a difference, but it did feel weaker when the truck was showing engine code lights.
List of parts replaced:
-Various Screws, etc.
-Various small parts
I hope this helps with guys considering a new 2013 Ecoboost F150. If you got question just ask. I am stating this because I do not want this to become 5.0 vs Ecoboost or Ecoboost is stupid thread. Thanks and good luck!