I can't tell you why 3 cyl didn't kick in, other than the IAT was above the required 15* F or the coolant temp was above 140*.

 

Just the owner told me its suppose to under -30 degrees. before it runs on the three cylinder, kinda glad because the high idle enough for the temp 0 to -15 or so and after that it takes a while to warm up.

 

Stay away from the Quadzilla. Look at enough reviews and you will understand. I was between either a Quad or Edge w/Attitude when I was shopping for mine. You can tap the pump and just run in on the second or third setting without harming your trans. You will see a better increase in MPG and throttle response with the pump tapped.