my buddy has an 06 dodge just put a fuel pressure gauge in it and his alternator started acting up putting fuel output out of it cooking the one battery. Did some testing in to it and found out the gauge had more resistance in it than it should of with everything being hocked to the ecm this made the alternator do what it did. Just thought this might be a point to put out there if anyone runs into something like this.

 

thanks for the heads up