My lumina hesitates at speed of 53 to 56 .Already been to the dealer and
they can't find the problem.The only code that came up was for the egr
valve.Replaced egr valve,fuel filter,plugs,wires,ck fuel pressure,remove
and cleaned trottle body and carbon on trottle body to egr passage.Ck
trans,ok.It runs great at any other speed.I don't know what else to do.