IAC valve: It is in charge of regulating the air flow into the engine when the throttle is closed or idling.
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It is placed in the acceleration body. It keeps the engine working properly when it is idling, that is to say, when the accelerator is not activated. It is governed by a small servomotor and it obeys the orders sent by the ECU. It plays an important role during the engine ignition.
Starts fine usually. Dies intermittently redstarts sometimes not others could be cold or hot stopped or on highway. No codes found instrument lights don’t come on when this happens it is just like engine disappeared. Sometimes when wet outside starts and runs less than two minutes dies and won’t restart until possibly the next day. New tps cleaned iac same map used ecm. Bought new dist from oreilly would go down in hole cast wrong.