Engine Performance problem
1993 Cadillac Deville V8 Front Wheel Drive Automatic 175000 miles
Engine will go dead even at 2500 rpm. I have replaced ignition wires, plugs, rotor, distributor cap and fuel filter. Can bad gas or moisture in gas tank cause this at such a high rpm even at fast idle. Egr valve replaced. Gas tank three-fourths full. Engine extremely smooth and hardly any vibration at any rpm. Transmission is excellent.