David, not at all. Thanks to you, I and anyone watching, know about the sensor. I measured it at 833 ohms, but not temp. I'll do that next. There should be a change hot and cold if it change signal as the engine warms (Could, because the change is in a just few seconds, fast like electrical, that doesn't eliminate a circuit in the EZL either.)

Jonathan led us to the EZL, the glories of variable timing through R16. (I can go to Radio Shack and get a little 2.5K pot, put in place of the actual R16 and easily adjust my timing for gas or altitude!!)

But so far, we are 50/50 Sensor or EZL:
A) Sensor is wrong and maybe changes some with temp.
B) EZL is overpowered by Vacuum
C) EZL is overpowered by Vac and temp sensitive
D) My Luck: A&B

It couldbe A&C but no dif in solution.
Can you help a little more? what does the manual say about checking the sensor any measurement values? Do yu have a bad one and a good one to measure resistance. I suspect ohms will not be right if sensor is not giving right signal -but of course maybe not. I ordered the MB CD manual but it willtake a week to get it

Johnathan said he would check the EZL to see how it responds to vacuum and R16.

Sure I can buy a sensor and get it in a few days, but what if its the EZL, or both. I don't have a spare to swap to break this 50/50.

Thanks to both of you and this board!!
Gary