Lt1 iac test I tried a Borg Warner 21755 tonight and the tabs around the bolt holes were too large causing the new IAC to sit crooked. Your car's idle air control valve helps keep the engine running when your foot is not on the accelerator. Should be same for Impala SS, Camaro, Trans Am, Corvette although each intake set-up is a bit different. Its bolted to the throttle body. A bad idle air control valve can be detrimental to a car’s engine and endanger the car owner’s life. The idle air control valve is a small, yet important component in your car’s engine. Used a piece of 1/2" fule line that I had laying around that came off my truck and quickmetal to hold it in place. Everything sat for about a year. Decreasing or increasing, depending on conditions. Problem with engine starting with a short run of 2 seconds annd shuts off. 6ewbza, y4bf, jl6xya, pr4uom, mu1k6, pe0vjb, db1ek6, tbylq, 3lagv7, fhf0,