voltage question

[SRT2SLOW]

hey guys. for the past couple of weeks my voltage hasn't been stable. it jumps from as low as 12.8 to 13.4 . i bought a diehard agm battery and its still doing the same. i just came from autozone and 2 out of 5 times it failed on their tester. it said bad voltage regulator. do you guys think I should try the alternator or just go with the pcm. I was gonna get a higher amp alternator if i do. thanks

 

[VENOMOUS1 RACING]

hey guys. for the past couple of weeks my voltage hasn't been stable. it jumps from as low as 12.8 to 13.4 . i bought a diehard agm battery and its still doing the same. i just came from autozone and 2 out of 5 times it failed on their tester. it said bad voltage regulator. do you guys think I should try the alternator or just go with the pcm. I was gonna get a higher amp alternator if i do. thanks

Try the alternator. You'll have a lifetime warranty and future peace of mind.

 

[10-1=9]

Seeing PCM's are almost impossible to get I would try a new alternator first.

 

[SRT2SLOW]

Am gonna try the alternator. I have an extra pcm.