Wiring Schematic Help

[fastacton]

I don't think there's a TBI truck ECM that uses an 8k signal. I just got my notification on the Jags that Run backorder and spent a good bit of time trying to find someone else that has something available, but no luck. I wish I knew who actually builds them.

[Bbc.monte]

I called them and they said their manufacturer stopped production but they are starting to make them in house. Supposedly from my research, 8k ppm is after 1993.

[lionelhutz]

I don't think any GM used 8k ppm into a PCM. They basically went from 2k or 4k to the reluctor ring with 40 counts per driveshaft rotation which comes out to around 100k ppm give or take depending on the gear ratio. I also believe all the sensors > 2kppm are an AC signal while the 2k ppm sensors are a DC signal.

I have a home made one that not using anymore. I could share the circuit if there is any interest. I just drilled holes in the gear for a couple of small cylindrical magnets and used a hall effect sensor to detect when they pass by.