Throttle Position Sensor Placement and Wiring

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The Throttle Position Sensor is bolted to the underside of the intake manifold assembly and is physically driven by a “D” shaped shaft that extends down from the butterfly that controls airflow to the second cylinder. The TPS is seen here just above and to the right of the double hose clamps. I included it in the Upper Sensor Group (despite the fact that it bolts to the underside of the manifold) because the wiring routes up through to the topside.

The Throttle Position Sensor is a Penny&Giles product. The current product designation number is TPS280DP. Quicksilver sold me an older version of the sensor for $37.50. Recently got a quote for the current Penny&Giles TPS at $245.79.

The Performance Electronics TPS uses an hourglass shaped mating drive so I stayed with the Penny&Giles part. Since the cost of the PE TPS is only $49 it may be time to go ahead and re-machine the drive spindle to fit the Performance Electronics part.

The connector appeared to be the relatively standard Bosch EV style 3 pin connector. This type of connector is frequently referred to as a 3 pin junior mini timer plug on the internet and the listed cost is regularly in the vicinity of $5. I cut the wiring apart on my sensor so that I could tell precisely which wires went to which pin. I then reassembled the connection using the readily available 3 pin Weatherpack Connectors. The Performance Electronics part numbers are 40000066 (for the male connector with case, pins and seals) and 40000067 (for the female connector also including case, pins and seals). These are $6.50 each for a total of $13 for the complete connection. Pegasus also carries the Weatherpack connectors.


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A wiring guide is printed on the back of the Penny-Giles TPS. Red is for the 5v power. Black is for ground. Yellow is for P1 (output). White is optional (and not used at all in the Zetec FC configuration). So with that guide in mind, M16 provided the 5v power to the red wire, M26 provided the grounding hookup to the black wire and M30 provided the signal connection to the yellow wire.


Next Chapter: Air Temperature Sensor Placement and Wiring