Alternator going bad?

[Gremlinsteve]

This shows at roughly 2000-2200

 

[pontiacgp]

have you checked to make sure the gauge is accurate?

 

[fleming442]

Given the cluster circuit board problems in these cars, I wouldn't go off the factory gauge at all.
13.8 is fine under load, but a good alternator should be 14.4 unloaded. If you can get to 14.4 on the charge stud with everything off the alternator is fine. If you're concerned about the drop with the AC on, get a higher amperage alternator.

 

[Gremlinsteve]

Yea I understand

But under load I'm seeing only 12.2 tops

 

[Gremlinsteve]

I ordered a new one. It's higher amp

 

[Gremlinsteve]

I ordered a new one. It's higher amp

 

[pontiacgp]

I hope you are not relying on the factory gauge to determine if you need to throw money at new parts.

 

[Gremlinsteve]

Nope

 

[Gremlinsteve]

Bolted on a one wire alternator and now it's charging
Showing 14.1 volts at idle

Thanks for halls help

 

[pontiacgp]

I like the 3 wire over the 1wire alternator

http://www.madelectrical.com/electricaltech/onewire-threewire.shtml