I found the 4 prong one for CIS/EZL right under the air filter housing. Got about 850 ohm reading across which says I am in the ball park (840 ohm @ 50 C). I will do another reading tomorrow morning when the car is cold and I should get about 3K ohm.

I felt kind bad after all this trouble, all I will accomplished for $70 is changing to the right coolant and able to read the temp right. It has nothing to do with how the car is running. Man, I had hope I could get rid of the high idle problem by achiving right temp.

Thanks for all your help.