Long story short, my Grand Marquis was built to run leaded gas and as such, had no oxygen sensors or catalytic converters from the factory. The wiring and connectors for the oxygen sensors are there, and I've just installed a set of upstream sensors, so I could provide the tuner with STFT/LTFT data.
Problem I have now is, there's no voltage going to the sensors. Initially I had no fuel trim data, so I checked voltage, which was zero. The sensors are enabled in the PCM. Any ideas?
Problem I have now is, there's no voltage going to the sensors. Initially I had no fuel trim data, so I checked voltage, which was zero. The sensors are enabled in the PCM. Any ideas?