Quote:
Originally Posted by g300d
I'm chasing an increase in average temps on the 3.0i.
Its going 95-96c average when it used to be 92-93c.
I just drove the 4.6is and the pusher fan is noticeable when it goes to high speed, and temps drop.
I notice that on the 3.0i the pusher fan doesnt go to high speed. It turns on when the AC is on but at low speed only, and most all of the time it's off.
Checked fan via INPA and it goes to high speed when actuated.
No errors stored.
I know the basics in that the fan is PWM and speed is controlled via DME. Any tips on troubleshooting this?
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Nothing wrong with your fan if you can command it to go to high speed. You will need an oscilloscope to see what type of PWM carrier signal is being sent to the fan. You can compare the signal to the 4.6 signal and see if they are the same. Most likely they are not. Because the 4.6 is a V8 and the 3.0 is just an I6, there is more heat generated by the 4.6 so the programming for the fan speed will be different.