Please help, truck driving me nuts

[05powerstroked]

i have a 05 powerstroke dually. 156k. My catalytic converter fell apart at the welds due to rust. After pricing a new cat i went for the cheaper route and purchased a 4" turbo back exhaust.

Ok, towing my 5th wheel horse trailer the truck goes into limp mode and throw cel 0299 when accelerating.

I can put my foot to the floor with no problems when i'm not towing.

Please help me. I just spent a ton of money replacing all the tires, and it just got out of the body shop for a front end fender bender (not my fault)

Please is there anything i can check or do before i go into bankrupcy by the ford dealer.

I just replaced both fuel filters and it still does it. Please help me.
Thank you

[05powerstroked]

anybody? ideas?

[Austin G]

That is a underboost code, the computer is sensing that your turbo isn't making enough boost.

[05powerstroked]

could that be caused by a bad exhaust backpressure sensor? I've never had a problem since i installed the 4" turbo back exhaust. It seems to fit because i've eliminated backpressure on the motor. Do you think my turbo is bad?

[Dietoremain]

Originally Posted by 05powerstroked

could that be caused by a bad exhaust backpressure sensor? I've never had a problem since i installed the 4" turbo back exhaust. It seems to fit because i've eliminated backpressure on the motor. Do you think my turbo is bad?

I dont think that sensor has anything to do with that..backpressure is created by the turbo itself the crap downstream just makes it harder to breathe, these motors like air in air out... anyway wish i could be more help..

[05powerstroked]

Looks like a torn upper intercooler boot. Should be here today, going to replace and see if the problem goes away. thanks for your help!!