[jonnotch]

I purchased a new alternator and installed it. But the guage reads at 8 or 9. When I rev the motor a few times it goes up to 12 to 14. But it slowly goes back down to 8 or 9. Is that normal on a foxbody car?

Thanks

Jon

[Speedstang302]

Originally Posted by jonnotch I purchased a new alternator and installed it. But the guage reads at 8 or 9. When I rev the motor a few times it goes up to 12 to 14. But it slowly goes back down to 8 or 9. Is that normal on a foxbody car? Thanks Jon

i hope you're talking bout volts, and mine does same thing, well atleast the stock one does, but i have an autometer volt gauge..but idk if thats a foxbody problem.

[ryans88gt]

Take the alternator back and get a replacement. Sounds like you got an alternator with one set of diodes already blown.

unless you have underdrive pulleys on your car, then it is normal...

[95StangMX]

if you have underdrive pullies thats it....if not you need to take the car and have the alternator and voltage regulator checked out....could very easily be the voltage regulator having that problem on my harley right now.....if you have a voltmeter check how many volts are coming out of the alt. at idle then check the regulator

[Speedstang302]

Originally Posted by ryans88gt Take the alternator back and get a replacement. Sounds like you got an alternator with one set of diodes already blown. unless you have underdrive pulleys on your car, then it is normal...

not everyone has problems w/ UDP on alt...8t6 hasnt, i didnt have it on long enough to notice and there are a few around that will say they are fine..but unfortunatly there are alot that will complain