There are a lot of things that could cause it to misbehave at idle. Check the 3 brass screws on the intake, they should be LIGHTLTY closed (clockwise). Make sure you hear the frequency valve buzzing on the right valve cover. Fix any vacuum leaks (like a hissing mode switch). Make sure the throttle spool is activating the idle micro. Check the vent hose on the control pressure regulater that it isn't kinked or blocked with dirt. Look at the air sensor plate, it should be centered and not rubbing the sides. Maybe it's time for an air filter, and on and on and on. Sometimes it is all this and more. Every little thing that is off just makes the engine run worse and worse. Could be dirty or clogged fuel injectors, bad spark plugs or wires, the list goes on. Sometimes the only way to deal with these kinds of quality problems is to just start from the beginning and do a COMPLETE tune-up. I do not recommend indescrimantly "tweaking" things to solve a problem. Most of the time you cannot fix these kinds of things by adjusting them out. You are only covering up the underlying problem, not correcting it. KEEP YOUR HANDS OFF THE MIXTURE SCREW, YOU WILL ONLY MAKE THINGS WORSE. Just make sure the plug over it is sealing tight so there are no vacuum leaks. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, dherv10@xxxx wrote: > Paul,you may want to look into adjusting the 02 adj in front of the fuel > distributor when the car is hot, but I think you may now be looking at a warm > up regulator. > John Hervey > www.specialTauto.com > >