dieselsalley
diesel
does anyone have any advice ???? truck has 5.8 engine 37 tires zf 5 speed.165000.miles daul tanks .truck runs perfect at idle and at low speeds .once you start going over 40 mph truck bogs out if you let off gas .slow to about 30 mph no problem .here is the kicker pull out on to the hiway she will pull strong to about 60 then booooooooggggs right out when you pull over she crawls about 5 mph bucking slight poping through the air box if you try to gas it .if you stop and idle for 5 minutes shes ready to go get up to 60 mph then booooooooggg all over again //////here are the things i replaced so far fuel filter,pickup coil,ign module,fuel pressure reg,ign coil,fuel pump,t-stat,fan clutch,air filter,:also the engine light comes on after driving 4 miles i tried to figure out the codes like 23-12-26-17-54-22-46-33-55-42 to me none of these would seem to be the cause ??