one other problem with my shadow.

1994 4Cyl, 2.5L.........when I start the car, it starts very smoothly and great, but when I back out of my driveway, the engine shudders, then goes back to normal, then shudders again, etc etc. The same happens at a stop sign when im stopped in drive, but it seems go away if I shift into neutral before i come to a stop. My friend said i might have an idling problem, or it may be something else. Any ideas on how to remedy this? Thanks!

oh one more thing, I already replaced the spark plugs and wires, rotor, and distributor cap, so the plugs werent the problem

make sure no belts are slipping. otherwise i have no clue. and im a rather experianced shadow owner lol. ive hade it for a few years now