I recently bout a month ago replaced my o2 sensor and that solved the poor idle, and till now it took care of the bog. now it is starting to get boggy again has no power to about 3k then will slam you in your seat.
need to get it running good quick have to tow my bike and Porsche to AZ in two weeks
help

thanks
Chris

 

For the idle problem it may be the Idle air control. These are a commen problem. Take it out make sure it moves freely and clean it up, or replace it. For the power till 3k it may be the tranny sliping. Or just needs a tune up.

 

Crazy, what do you think about it being the Throttle Position Sensor sticking?

 

If it was sticking, I would believe it would just stall the truck unless you kept your foot on the gas.

 

Usually if it runs when you keep your foot on the gas, it's most likely the IAC.

 

The IAC is new, and sorry for the confusion the truck idles fine was just stating that replacing the o2 sensor fixed the poor idle and it also took the bog away for a wile and know it is starting to get boggy again. the transmission shifts firmly i don't believe that it is slipping

 

what about timing? before i replaced the o2 sensor i was messing with the timing tomorrow i will get out the timing light and time the truck and see what that does. What do these engines like for timing?

 

Timing fixed it I think. Still a little boggy when it is cold but other than that it is gone