Hi all. So I just completed a 4 switch and resistor build for high idle and combined winter mpg fooler but I had a question as to the resistance on that.I'm using a 2.2k ohm resistor to get a reading of 143*F through the IAT. Obviously I want the highest reading I can get and still save the advanced timing from my edge comp. What got me thinking is even in the summer I never saw a reading quite that high, I saw 130's plenty of times but never more than that. Is 143 too high and the vp is going to retard timing to prevent problems that it thinks are coming therefore taking away the gains I am trying to get here. I'm having a really hard time being able to tell if I'm actually getting better mileage with the fooler on vs just the truck up to temp and the IAT reading ~100*Has anyone done any experimenting to see if a slightly different value would be more beneficial and if I should change out the resistor so that the fooler is reading 130 or so.Any help is certainly appreciated

I think Russ has a rotary switch with a few different values going.

Yes, I was building the rotary switch with different resistors but it hasn't made it from the bench to the truck. I was going leave the toggle down for stock, up for fooler... as it is now... but have the fooler selectable with preset values by different resistors. Some others had rheostat but used scan guage to adjust the value (I don't have scan guage).

I've also got the rheostat on my floor. I can adjust the value also I do have a Scangauge II.