2005 Elantra GLS
I dont know what else to do. Car sputters when driving but not all the time (seems to be around 3000 RPM). Then it will stall at idle if i dont keep my foot on the gas. Also has lost power on the freeway, with the car still on, then power comes back.

Checked the spark plugs, wires, alternator. Replaced fuel pump, fuel filter, air filter, battery.

PLEASE HELP only 65000 mile on the car.

 

fuel pressure regulator maybe? see what psi its at and check the injectors to see if there spraying correctly