Originally Posted by
ibsorgn
I have a question I thought that I would pass it by this forum. I'm now running a 1st gen TT ECU in my 94 supercharged SL but I recently have noticed the AF ratios have been bouncing around a lot. Using Pin#7 and ground on the ODB1 hybrid, I got two signals 11 and 39 which indicates that the ECU is not receiving o2 signals. (I split my single O2 signal and feed both O2 pins #55 and #56). So I thought, no big problem, I'll just replace the O2 sensor. No change, so I decided to take a closer look and found that I'm getting power to the O2 heater, Ohms test shows continuity to the O2 signal & heater ground but no pulsating voltage for the o2 signal wire. In fact when I rev the engine I get a momentary increase in the O2 signal voltage then back to zero. Can you suggest what I might test or what might be the problem? I'm stumped!
