Hi I have a TJ 97, its been in storage for the last year. I replace the cam, crank shaft sensor, plugs, and distributor cap. The Jeep starts up cold, but after 5 min. its begins to idol bad and feels like it could back fire. Generally accelerating solves this problem temporally. However once you down shift it spits and sputters. The cad converter was repalced about two years ago and the intake valve gasket was repalce 5 years ago. Open to comments.