• Idle Air Control Value ( IAC Valve ) Controlled by the onboard computer.
• The computer moves the pintle in and out of an opening that bypasses the throttle blade.
• IAC Valve Allows the computer to precisely control idle speed when varying loads are placed on the engine.
• Symptoms of failure include engine stalling, surging, poor idle conditions, and or a check engine light.
• Check for proper operation with each tune-up and replace when trouble codes indicate failure.

A stepper motor is controlled by the onboard computer. The computer moves the pintle in and out of an opening that bypasses the throttle blade. This allows the computer to precisely control idle speed when varying loads are placed on the engine. Symptoms of failure include engine stalling, surging, poor idle conditions, and or a check engine light. Check for proper operation with each tune-up. Replace when trouble codes indicate failure. Walker Products began supplying the fuel system needs of the automotive industry in 1946. Today Walker is one of the largest, privately owned manufacturers of fuel system components and engine sensors, and has served the needs of the worldwide automotive aftermarket. We are committed to supplying products manufactured to meet or exceed OEM standards and specifications. This effort is backed by our own manufacturing, product management and engineering staff to ensure it is maintained and accurate in the production of quality parts, vehicle applications, instruction sheets and technical support. Our products include Carburetor and Fuel Injection Repair Kits, Oxygen Sensors and other Engine Management products such as Throttle Position Sensors, Cam and Crankshaft Sensors, Fuel Injectors, Spark Plug Wires and kets. As an ISO 9001: 2008/TS16949 certified company, we are committed to supplying the highest quality products. Vehicle Fitment: Buick Century 1988-1985, Electra 1987, LeSabre 1988-1986, Regal 1987-1986, Riviera 1987, Roadmaster 1993-1991, Skyhawk 1987-1983, Skylark 1988-1985, Somerset 1987-1986, Cadillac Cimarron 1986-1985, Fleetwood 1993, Chevrolet Astro 1994-1985, Blazer 1987, C1500 1995-1988, C1500 Suburban 1995, C2500 1995-1988, C2500 Suburban 1995-1992, C3500 1991-1988, C3500 1995, Camaro 1992-1985, Caprice 1993-1985, Cavalier 1986-1983, Celebrity 1986-1985, Corvette 1989-1985, El Camino 1987-1985, G10 1995-1987, G20 1995-1987, G30 1991-1987, G30 1996-1995, Impala 1985, K1500 1995-1988, K1500 Suburban 1995-1992, K2500 1995-1988, K2500 Suburban 1995-1992, K3500 1995-1988, Lumina APV 1995-1990, Microbus 1999-1992, Monte Carlo 1988-1985, P20 1989-1987, P30 1996-1987, R10 1987, R20 1987, S10 1995-1985, S10 Blazer 1994-1985, Tahoe 1995, V10 1987, GMC C1500 1995-1988, C1500 Suburban 1995-1992, C2500 1995-1988, C2500 Suburban 1995-1992, C3500 1995-1988, Caballero 1987-1985, G1500 1995, G2500 1995, G3500 1996-1995, Jimmy 1987, K1500 1995-1988, K1500 Suburban 1995, K2500 1995-1988, K2500 Suburban 1995-1992, K3500 1995-1988, P3500 1995, R1500 1987, R2500 1987, S15 1990-1985, S15 Jimmy 1989-1985, Safari 1994-1985, Sonoma 1995-1991, V1500 1987, Yukon 1995-1992, Isuzu Pickup 1994-1991, Rodeo 1992-1991, Trooper 1991-1989, Oldsmobile 98 1987, Bravada 1992-1991, Calais 1987-1985, Cutlass Calais 1988, Cutlass Ciera 1988-1986, Delta 88 1988-1986, Firenza 1986-1982, Silhouette 1994-1990, Toronado 1987, Pontiac 6000 1986-1985, Bonneville 1988-1986, Fiero 1986-1985, Firebird 1992-1985, Grand Am 1989-1985, Grand Prix 1987-1986, J2000 1983, Parisienne 1986-1985, Sunbird 1986, Trans Sport 1995-1990