Sometimes when I start the truck it revs up some insane amount around 6 grand and my Temp gauge is pegged high and Battery Charge gauge jumps around and tach never works (I use an aftermarket). When I unplug the 12v to the choke the Temp gauge reads normal but battery gauges still jumps. Does this have anything to do with it reving up? Where should I pull the 12V for the choke? I have it coming off post on the little solenoid near the battery.