I just had my alt. rebult about a year ago and the people who rebult it really knows what they are doing. Well tonight I got in my car and after I started it I noticed my rpms were jumping up and down about 300 rpm. I looked at my volt gauge and it was way down. So I said what the hell and took it for a ride and as i went down the road the volts jumped back up to thier normal spot. I thought maybe a little moisture got in the alt. cause it has been raining. Well i was going down the highway and the volts went way down again and prob about after 10 min went back up. I dont know what the prob is but ill prob get it rebult soon. I also have underdrive pulleys there too. But i have had them on there for several months and i would think if that was gonna make a difference it would of done it along time ago.. well if ya have any ideas let me know.

 

if I were you I'd just buy a new alternator, it will save you the hassle of getting that one rebuilt every year.

 

Well i took it back to the place where i had it rebult and they took a look at it and all it was, was a wire inside that was broken...they didnt get to specific. They didnt charge me nuttin so i lucked out this time!