mngixxer

I have a new battery in it, had the alternator tested and it tested good. What else could it be? Once its been running for awhile, the amps drop down damn near to the 8 mark on the guage - if ya turn ac on, it drops further.

Thanks,
Scott

Austin8214

Check and clean all of your grounds.

mngixxer

How many grounds are there? Sorry I sound kinda stupid on this but I didnt see a whole lot of them.

Austin8214

For starters check the negitive cable that runs from your battery to the engine block. Also have you had any work done to your truck lately? Other that insalling the new battery.

mngixxer

The only negative that come off the battery goes to something that is run off the main belt -- its not the alternator and grounds out onto it is a brand new cable. No - not that I know of. I just got done doing a tune up but the truck was like this prior to me doing a tune up.

BULLITTR6

I was going to suggest maybe the voltage regulator, but the book I have says your truck has an internal regulator in the alternator, and you said it tested good. That is unless you have the optional 165 amp alternator, which has the regulator on the back of it.

If your truck starts and runs good, I would guess you have a bad connection to the guage or a bad guage. Really, the charging system is pretty simple, as in not many components. I would agree with a bad ground connection.

Good luck and please update.

__________________
1991 F350 dually w/ 7.3 deezal
2008 Mustang GT
1993 Rodeo LS w/ 3.2 v6, 2wd (daughters)(Now totalled)
1991 Yamaha XT600
1993 Honda CR250R
Hard tellin', not knowin'

mngixxer

The truck doesnt always start good. if its warm, it has a hard time starting which is leading me to believe it might be a coil bad on it. Once it sits and cools down - she fires right up. A buddy of mine also stopped by last night and said check your cap and rotor cause if thats cracked, it can also be acting up like that.

Scott