1989 Pontiac Trans Am GTA Fuel Injection Tuning - 101 Tech Idle Mischief
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Throttle Position Sensor Adjustment - With the jumper removed on the ALDL terminal and the IAC plugged back in, we used a T-25 Torx to loosen the screws on the TPS, one very loose, the other slightly snug, so the TPS will stay in place when we get the right value. The protector on the front of the TPS connector unclips and swings out of the way, allowing the use of voltmeter probes (negative into the top terminal; positive into the second; the third is not used). View Related Article
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