MisterBill2
- Joined Jan 23, 2018
- 18,576
OK, that makes things a lot simpler. If adding the simple filter to the oxygen sensor output solved one problem mut seems to have made the voltage too high, I am wondering about the ground return connection. To be specific, is the capacitor ground tied to the sensor output ground? If the cap is at all leaky and the ground points at different voltages then that is your problem. If not, then more thinking is required.It's to avoid having to replace the catalytic converter