have a 06 3500 4x4 6sp and when i drive it hard and fast or realy romp on it the dummy light comes on. Sometimes it will bog down and does not have any power. U have 2 get out of the gas and then back n it and every thing is alright but the light is on. It will go off on it own if i take it easy and behave for a coupple of days. I have hade it at the dealer and they can turn it off but they dont know how 2 fix it. The computer said it was somthing 2 do with fuel presure. I think i need a lift pump it has done it since it was new and ive got 34000 miles on it now. can any help or any ideas