maft- Intake air Temp Sensor Signal wire

[robbo185]

What does this wire do??

I had it unhooked because it fell out of the crimp and i got around to fixing it today. I plug it in and the car barely runs has little to no vacuum and runs rich. I unplug it again and it runs great....-20 vacuum, good idle....good a/f....

anyone?

 

[robbo185]

update........i had the wire in the wrong slot...i had it in terminal 3 instead of 4. But still wondering what the effects are if this isnt hooked up

 

[dbsupra90]

the ecu uses the air intake temp sensor in its a/f calculations. since the afm is no longer in the system the maft simulates a signal of ~70F.