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I'm having problems getting the proper power supply to this guage on my 06 m7. I have tryed the Acc. Plug. The gauge will come on but only reads one cyl. Checked voltage and it will fluctuate between 11-9 VAC. Then tryed connecting to the red fuel pump wire. Here i'm getting a steady 15.0-15.1 VDC. The guage does the same thing...will only read one cyl. I even wired in a small 7812 Volt Reg from radio shack to get a steady 12vdc...still the same. Now, if i use a battery to power the unit it works fine. I get readings from both cylinders. Anyone have any input/advice? I'll be putting in a call to Koso but wanted to check here as well. Thanks
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