96Intrepid,
Give more details. Does it happen only when the car is cold or when the weather is cold? Does the car ever do it when the car is to temp? Do your RPMs go up and down or does just the car hesitate? Does it do it at all speed ranges or only when your first accelerating from an idle, some things to consider:
1. After the sun is completely down, turn your car on, spray mists of water all over your spark plug wires. If you see any arcing, replace your wires (you should anyways around 100,000 miles).
2. Are there any obstructions in your intake box.
3. When was your fuel filter last replaced?
4. Does the car hold fuel pressure (fuel pressure regulator, fuel pump)?
5. If you have the 3.5 DID YOU EVER HAVE THE INTAKE MANIFOLD GASKET REPLACED? This is very very very common in the 3.5's. I beleive you can pick up this problem with a vaccum gage. When I had this problem I would notice it big time accelerating from an idle, the car would hesitate, then kick in. It would do this a couple times before the car started moving. Hope this helps!
[ June 28, 2001: Message edited by: Mopar4U ]