car idles up and down when cold sometimes dies

cannot clean the iac motor. replace it and i bet your issue goes away. Roy

I would suspect the coolant temp sensor that is like the choke for injection systom, not the temp sender for dash gauge or light but will have more wires, weatherpack connector to seal out water and real close to the thermostat housing. Might try unplugging while engine is doing this and see if stops. May need to monitor oxygen sensors also to see if having probs going from open to closed loop, will need to do this with a scanner. Sorry, Roy, did not mean to step on toes. Your response popped up when I posted.