1989 Pontiac Trans Am GTA Fuel Injection Tuning - 101 Tech Idle Mischief
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The cone portion on the end of the IAC Stepper motor must get a decent seal inside its port to meter the idle air properly. We removed any soot and made sure the cone seal area was clean and in good condition, using a bit of fine steel wool on the IAC cone. We also sprayed carburetor cleaner into the port and cleaned that out with the tip of a large Phillips head screwdriver wrapped in a rag, getting a fair amount of soot from that area as well. View Related Article
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