Holley Terminator X - Fox Body Mustang IAC upgrade
Channel: 88MustangGT
Date: 16/11/2022

from PWM (pulse-width-modulated) to GM style Stepper IAC. The Idle Air Control Motor (IAC), also referred to as the Throttle Air Bypass Valve (TABP), is a stepper motor controlled by the vehicle's onboard computer. The computer moves the pintle in and out of an opening that bypasses the throttle blade.