Well, the title explains it all. The truck is flat out gutless. I have slid the plate full forward and adjusted the afc and it made a minor improvment at most. The truck will also not go faster than 80mph. Can someone tell me where to look so I can start tring to fix this thing. My 1st gen ran circles around this truck when it was stock. Any advice would be appreciated.
Cody

 

Read> https://www.dieseltruckresource.com/...threadid=53286

 

might have 4.10 gears which would explain the low cruising speed and as for the power, check the filters, starwheel diaphragm, plugged muffler, or a leaking intercooler or fittings.

 

if its like mine was then ur cable to ur pedal is stretched and u cant even get decent pedal travel...get under there take out the slack and increase ur pedal travel....

simply get under ur wheel there and see how much the pedal pulls towards u it shouldnt really!! so take that slack out so its tight