I've been searching the boards and seen this same jumpy idle problem (jumps when warm and occasionaly upon starting, stalls at stops) posted and diagnosed at least 20 times. After reading, i realize this problem could be caused by a number of things and I just kinda want to pull together a list of what it could be. So far I have:

Vacuum leaks, TPS, Distributor, Rotor, Coil, Ignition module, Idle air control, O2 sensor

Im sure im missing a bunch so please add to the list.

I changed my O2 sensor and ECM today with no improvement, I guess I'll just chug thru this list until something helps...

 

Around this time every year lots of people have problems with their MAF relays as well. Buy one and swap them out to see if you get any improvement.

 

dont forget the ever so famous EGR problem. i just replaced my EGR and EGR temp sensor for about 70 bux at Napa. go ahead and try it. if it doesnt work, atleast u know that ur EGR isnt the problem, lol.