I've had this problem for about a month. Car starts right up. Runs smoothly. After two or three minutes, before the engine is up to operating temperature, in park or at a stop sign in drive it starts running rough. I can put it in neutral, rev it up a few times and it idles fine. If I don't rev it up and take off it bucks a little and is then fine. Then until the next day it starts and runs fine all day. No check engine light. 113,000 miles. This weekend I replaced spark plugs, wires, coil packs and the five crankcase vent hoses. No change. I didn't expect any of those to be the issue, but it was past due. As preventive maintenance I had D.J. refurbish my RCM in July. At about the same time I replaced the camshaft and crankshaft sensors. Both were Bosch. I'm thinking one of the O2 sensors. Any ideas or comments