Originally Posted by Nightmare2020

My 2020 f150 XLT EcoBoost has 39k miles.
has K&N cold air intake
borla atak exhaust
turbosmart blow off valve
diablosport trinity ex tuner with custom tunes built for truck

when I accelerate from still it’s fine but when I accelerate from say 60 and floor it. The truck goes into limp ish mode and looses power. First time didn’t throw a code. So I pulled over and switch cycled and cleared the wrench light.
then when it did it again it threw p04db which is crank ventilation tube sensor and threw wrench again

my question is I’m reading a lot about when adding a cold air to the air EcoBoost a tube is required to go in the crank ventilation to prevent the code. Is this true and will this cause truck to go in limp?

also what else could cause my issue? Thanks in advance

also to add just bought this truck used to other boosted vehicles from another brand and haven’t dealt with issues like this before. Also truck came with all parts installed so don’t have any original equipment to be able to try reverting back to factory

Originally Posted by WVMoose

I would still source a stock intake and try that.

You could even trade yours with cash to someone who thinks it’ll be better.