1990 auto
Has anyone tried bypassing the water going to the throttle body and idle air control?????
It doesn't snow here, so heating it up is not needed.

 

I did bypass the coolant going to the TB but you will need the coolant in the IACV to allow it to warm up properly! It's your automatic choke!

 

Makes sense.
I thought the temp sensor might do that.

 

The water temperature sensor let's the computer know the temperature to be in either open loop (cold) or closed loop (warmed up to temp) and once the water temp is up to temp the O2 sensor is the reference for your fuel/air mixture ratio...The IACV modulates how much air needed especially when the motor is cold. Most of the time the coolant lines that are for the IACV clogged shut with rust/corrosion not letting the coolant reach the IACV to alter the air quantity causing a huge like air leak! Cause the step motor wax pellet should reduce the air being bypassed as the car warms up!