svt_fomoco
CEG'er
I bought the dual gauge kit from aeroforce. They are useful and look good. You can set the gauge to flash it's two bright LED's when certain thresholds are exceeded. I have set one gauge to flash at 3750 (RPM when secondaries open at WOT) and the other gauge to flash when coolant temp goes above 220.
I used the gauge to help diagnose a bad upstream O2 sensor. I was getting a P0133 code so I set the gauge to monitor both O2 sensors and watched it on and off for a few days. It turned out the B1 O2 sensor was 'lazy' not varying from lean to rich as it should. It would stick on a lean or rich reading for a long time. I replaced the O2 sensor today and so far it is acting normal. I hope my fuel mileage will increase now.
I used the gauge to help diagnose a bad upstream O2 sensor. I was getting a P0133 code so I set the gauge to monitor both O2 sensors and watched it on and off for a few days. It turned out the B1 O2 sensor was 'lazy' not varying from lean to rich as it should. It would stick on a lean or rich reading for a long time. I replaced the O2 sensor today and so far it is acting normal. I hope my fuel mileage will increase now.