thunder550

iTrader: (70)

Weird problem that just started happening. When I got WOT, my voltage will drop down to around 12 or so. Seems like the alternator just stops charging. I never had this problem before the blower, but I can't see how that would cause any issues. Anyone seen anything like this before? As soon as I let off the gas it comes right back up to 14.

MikeGyver

iTrader: (5)

I wouldn't be surprised by anything that somebody says how their voltage regulator was acting right before it caught on fire.

ChevyTruck

iTrader: (39)

Talk to Dewey he had a voltage problem also.

thunder550

iTrader: (70)

Ahh forgot to add, this is a brand new alternator as well. I'll talk to Dewey and see what his issue was.

marlboroman71818

sounds like your belt is slipping on the crank pulley to me. Do you have the crank pulley pinned? Is your 2300 producing boost like it should be?

MikeGyver

iTrader: (5)

Let us know, too.

GMCtrk

iTrader: (27)

His voltage issue was due to the HP tuners cable plugged into the port, it had a bent pin or something.

Belt slip sounds like a good idea, also with the belt pattern is there any way that the alternator is being spun beyond its limits up top?

thunder550

iTrader: (70)

Crank is pinned, making plenty of boost. Alt is actually not brand new, it's an OEM reman. Talked to Dewey and he said that bad voltage regulators are common problems on 99-02 trucks, might see if I can get a different alt to try instead. Any other ideas?

terravast4

iTrader: (25)

+1 for belt slip.

2005 Silverado

iTrader: (19)

I experienced this kinda problem 1 time on a N/A 4.3 that was swapped into a Zuki Samurai. The person who did the original swap put the wrong belt on it and the tension was super tight and at higher rpms the voltages dropped, this also caused premature wear on the alternator and it was starting to lock down.

Dont know if this helps. But throwing it out there.

Dustin

EDIT: About belt slip. Boost is good (if i read correct before) so if it was slipping, the boost would drop to wouldn't you think?