Voltage Problem..
Voltage Problem.. I was looking for some help and thought you guys could help some.. I got a 95' Trans Am and the voltage when I start the car after sitting is about 12.5 volts, but as it runs drops to 11.0-11.2 and stays there according to my scanmaster. The gauge reads right on the yellow mark. I have 4 gauge ran from my battery to alternator, battery to starter, battery to distribution block for pos+ and 4 gauge for the gnd-.. I have a msd box, electric waterpump, 2 gauges, underdrive pulley with overdrive on alternator, stereo system all 4 gauge and capacitor.. Reguardless of the stereo being on or off it still discharges, no matter what rpm it never picks back up.. I have also tried 3 different alternators I have for my car, all do the same.. Any suggestions?
TECH Senior Member
iTrader: (42)
Joined: Dec 2004
Posts: 5,063
Likes: 0
From: Tomball/Nacogdoches TX
I have the EXACT same issue. Except at startup, I hover around 13.5 volts and it drops to the 12.5ish and eventually dips into the 11s if i drive it enough.
Did you try upgrading your ground wires? That's the next thing I'm about to try.
Did you try upgrading your ground wires? That's the next thing I'm about to try.
