Did you clean the EGR ports in the head? They are the cause most of the
time.
"wassa" wrote in message
> 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.
>
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