1989 Pontiac Trans Am GTA Fuel Injection Tuning - 101 Tech Idle Mischief
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We started the T/A and used a low-scale tach to get the engine idle to approximately 500 rpm. This will now be our low idle, or minimum-air adjustment, performed at the throttle stop on the driver side of the throttle body with a T-25 Torx. Tip: If your idle is too high, you might have an intake leak. Intake leaks are common in Tuned-Port cars because of the multi-piece intake plenum and runner design. Plug your IAC back in, and use carburetor cleaner to spray around all the intake manifold seams. If the idle drops consistently when the carburetor cleaner is sprayed in a specific area, you have located your leak. View Related Article
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