posted on another forum with no response, so any ideas would be great. my truck is a 2001 3500 4x4 ho 6spd. two months agoit got an inj pump. last month it got a new lift pump. still under warranty. dodge says nothing is wrong. i cleaned the map sensor and iat sensor and nothing. it pulls great 1st and 2nd but after that nothing. its just slow. today i got a 0236 code [map sensor too high too long] . what gives? thanks for your time

 

I am not too familiar with all the codes and how things work so maybe someone else will clarify this for you but I do believe that if you were getting too much boost the ecm will defuel the truck on its own hence the lack of power. Perhaps your wastegate is not opening up and allowing too much boost for a stock application and then defueling.

 

If your truck threw a code go back to the dealer.

 

cleaned map and iat sensor, did reset and no code. think it might be wastegate accuator? book says pull 19.3psi vacum and rod should move. i pulled 25psi on mine and no movement

thanks again

 

It should say apply 19.3 psi pressure.

 

Check the waste gate on the turbo. Chances are the gate is stuck and not opening. Go to your dealer if you are still under warranty (provided you trust them, of course!).
Tom

 

id rather not go to dealer if i can fix it. how do you check wastegate?