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Old 02-03-2015, 02:39 PM   #31 (permalink)
j12piprius
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Join Date: Feb 2011
Location: central california
Posts: 587

pris prius - '12 Toyota plug in prius
90 day: 71.09 mpg (US)
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pgm-f1 causes drain

If you're using this mod, I suggest switching your Ultragauge on and off 20 times (with the engine off) with 3 second pauses, and checking the drain in your battery. The pgm-f1 in my car used .05v each time it was switched back on, thus 20 times drained 1 full volt, causing the alternator to run more when using the kill switch, and lowered mpg.

I moved the kill switch to an injector wire under the hood, and the issue went away.

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