My Innovate SCG-1 AFR/Boost gauge sometimes doesn't display the AFR after starting the engine. Other times, it loses the AFR display it had been showing. I emailed Innovate Motorsports that my guess is there is a short either in the O2 sensor pigtail or in the cable that connects the pigtail to the actual gauge.
Does anybody know if the SCG-1 uses the Bosch 4.2 or 4.9 O2 sensor?