IROCthe4.0
NAXJA Forum User
- Location
- connecticut
Ive got a 99 XJ 4.0L AW4 4x4 This started about 3 weeks ago. I changed the plugs and wires in my Jeep. I used champion plugs and a good brand of wires(forget the name). Anyway after I finished and drove it the motor developed a stumbling idle. It would idle fine but every now and then the revs would drop and the idle would get rough, would only happen for a second and only when stopped. Then the revs would go back to normal til it did it again. I figured I prolly needed a new cap, so I replaced that, didnt help. So now as of recently its been getting worse. The stumble lasts longer and is more frequent. It drives fine but has this stumble. When it happens it kinda shakes the whole Jeep. Theres no codes and no CEL on. Im thinking this could be a sign of the fuel pump going. What do you guys think?