The car was tuned without a VSS connected. I have a FORD VSS sensor that is in my T56 magnum transmission. I made a conversion harness to connect to the FORD sensor to LS1 VSS connector.

When I plug the VSS in and go for a drive the idle hangs up way above idle like 1300ish(can't remember exact rpm) until I come to a complete stop with the clutch pedal pushed in. For example rolling to a stop light.

desired Rolling idle speed is set to 0 across the board.

Here is the tune:323is original dyno tune.hpt

Any suggestions?