I moved my wiring over to my iat sensor in my lower intake manifold tonight.
Strange thing is, it reads 100 degree's F with the motor cold. That's not right. It's 70 degree's in the garage, and the motor feels cool. Umm......
I measured the sensor in my Maf, 28.76k cold. No ambient heating from the motor for sure. Looking at previous data logs, I can see the sensor is reading correctly in livelink.
I measured the resistance of the sensor in the lower intake, and its just over 5k and reading 144 degree's F with livelink.
Tomorrow morning, before I leave for work, Ill measure the resistance of the manifold iat sensor.
Here's a chart that shows what temp to expect the pcm to read at different resistances.
http://www.aa1car.com/library/air_temp_sensors.htm
The curve isn't exactly linear, but adding a resistor might make the slight difference where required.
I'd ignore the manifold sensor and just go with the maf sensor, except I want to spray w/m and I keep reading that this is very bad for your maf, but at the same time I want the sensor to read the cooler temps when spraying. Problem currently is that the manifold iat sensor will cause the pcm to pull timing almost all the time. This just won't do.
Maybe there's a reason why the iat sensor is no longer installed in a lower intake? I'll log while driving and compare 2 logs, one being with the iat sensor in the maf.