Did they "flash" your computer with new software when it was in the shop last time?
If so, there could be a new cooling strategy loaded that is causing this.
Ben.. His rig is an 07 5.4... no EcoBoost on this bad boy.
My 5.4 F150 was a 97 model... it 'never' did as this truck is doing... not so loud that it overcomes everything else. I do agree..something is out of kilter.
I rented an 2012 or 2013 5.4 E350 passenger and it did roar from the fan as described... Very loud.. this makes me think that there could have been a reflash of the ECM.
Just some thoughts..
Thanks!
Jeremiah
