I finally gave up on my LM-2 and SSI-4 this year. I had similar results with the SSI-4 trying to read a wheel speed sensor and I also tried to use the Duty Cycle function to read my solenoids while progressing the nitrous. Neither gave me a signal that made any sense. Way too much noise. I have a clean power and ground right to the battery and all the sensor cables are shielded,
Just wiring in my new Computech DataMaxx system.