Can't keep my voltage up......
My fuel pump does the same thing at idle and I have two 10ga wires/relays feeding it right off the battery. Big pumps are very sensitive to small voltage changes sound-wise. Just about any electrical change makes the pump change pitch at idle.
I also run a voltblaster for a little extra insurance, at WOT I'm at like 15.5v.
i added a voltblaster and that seemed to have solved it. i think i see like 14.5v or so at WOT using my original stock 98 alternator.
Its a good thing to have IMO, one of the better 80.00 I spent on the car
Now to figure out the alky tank....




