Intermittant loss of power to fuel system, Starts fine and runs normal for about 15 mi. acts like out of fuel. eventually catches up and runs fine till decelleration, at this point accceleration must be kept up to run. Have replaced rail fuel pump, tank pump and fuel relay....any suggestions?

 

check your grounds. there is on on the core support in front of the battery. there should be three wires to it. clean the connections and see if that helps.

 

have you changed EEC relay aswell? if this one fails so does the whole system