The part in you picture is the air-flow potentiometer (sp). The TVS is in back of your throttle body and is actuated by your throttle linkage. It is a small black switch with a roller on a arm resting against a piece of the linkage.
This is what I understand to be, but of course I could be wrong. Someone will correct me if I am, I have been fighting the same problem for about a year and it is not easy everything I do makes a minimal change but cure the problem.

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“Fundamentally, sustainable development is a notion of discipline. It means humanity must ensure that meeting present needs does not compromise the ability of future generations to meet their needs.”--- Gro Harlem Brundtland


1989 300se 250,000
1983 BMW 528e 100,000
1999 Olds Alero 80,000

These pretzels are making me thirsty.