My 2004 Ford Taurus is starting to idle rough.. sounded rough this morning when i first started it. Also, when i press on the gas pedal around 40 mile - 45 mph the cars start to hesitate.. jerk.. Could it be fuel pump.. never had the fueld filter changed...
You may need to perform a tune-up such as; spark plugs and wires, fuel filter, and air filter. You can also replace the EGR (exhaust gas recirculation) or IAC (Idle air control valve) both are fairly in expensive to replace, and will assist in narrowing your search for a cure.
〉 Answered on May 29th, 2013 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions