Today i removed exhaust stack took my truck down to the gas station with just a straight pipe about 4 feet long off the turbo. Lost power and started idling rough. Occasionally it will run normal for a second or two then right back to no power. I can push the pedal to the floor and no response. Im at a loss. It ran fine today then after i removed the stack all hell broke loose. Now its useless... Cant drive it to work like this... Any help or ideas?

 

tps is gone.throttle position sensor (TPS)

 

P0480
P0483
P2509
P2149.

​​​​​The only change i made to the truck was removomg the stack from just in front of the rear. Axle and the s pipe going through the bed. After this i drove tje truck. 1/4 mile and everything is crap now.

Why would removing a section of exhaust pipe cause all the problems.?
It is 5 inch pipe from turbo back no catalytic converter or muffler. Is there a sensor or ground i am missing somewhere?