The Ignition will not park, untill the TPS triggers the Idle Mode in the ECU. Before that the timing will drift around.. 1. get the .45 from TPS. 2. turn off the car. -->Disconnect the TPS<-- The Dangly one. 3. start the car, I let it run for a bit then plug in the TPS connector. It should snap down to Idle Speed
This is what works for me.. then I can set the Idle Timing..