[aerohead]

Originally Posted by JulianEdgar

1. No car uses a rheostat as the throttle position sensor (TPS). They use a potentiometer. Different device, three wires versus two, with a different output (voltage versus current). There is no 'varying resistance signal', there is a varying voltage signal.

2. In cars without electronic throttle, and excluding the earliest L-Jetronic systems that used a full-load throttle switch and the 'carby-like' Bosch Mono-Jetronic system, the TPS is not used to indicate load to the Electronic Control Unit (ECU).

3. Engine load is determined by either:

- the combination of a MAP (Manifold Absolute Pressure), engine RPM and look-up tables that correlate these with engine volumetric efficiency

or

- the output of the airflow meter

The main function of the TPS is to control transients - eg fuel enrichment / enleanment on throttle increase / decrease, and the same for ignition timing advance / retard.

Note that in throttle stop testing, the throttle is not moved.

As I said, you obviously don't have much understanding of engine management systems. That's OK, but it makes criticism of the throttle stop method based on your misunderstandings pretty problematic.

You may read all the listed papers and find out for yourself what they knew.
You may re-read my remarks. Obviously you never have, or you wouldn't be making the asinine remarks that you are.