Inliners International Forums General Discussion Hi Performance New Guy Here. 68 Camaro with an L6 250.

On the cheap, I'm pretty sure you can measure voltage on an inexpensive non-heated narrow band O2 sensor with a sensitive voltmeter. I have not done this but believe it to be possible. Will tell you whether rich or lean and potentially guide toward solution.

If you buck up for a real sensor and display you will use it more than once or twice...