About 2 months ago my cars battery light would come flickering on at 4000 + rpm... now it just came on ALL of the time. Is this battery or alternator ??

 

Sounds like a problem with the alternator. Maybe before when you hit 4,000 rpms, the alternator was having issues with spinning. Now it is even worse.

 

Go to an auto parts store. They have what you need to test both battery and alternator and they will be able to tell you what you need.

 

Mine did this twice. Both times were on the startup after replacing the engine. It eventually went away for me. Go to autozone like gt96 said. They'll hook ya up.

 

Wow... that happened fast...

Alternator, car died on road as I frantically raced to get back to my dealership for warranty repair.

Now the only thing I'm worried about is if they'll make issue of the faded track numbers on my windshield and driver side door, I couldn't quite get it ALL off...

 

Mine did that to, it started the same time the crack in my water crossover developed (it was right behind the alternator and sprayed water right into it)
fixed the intake, no more problems

Problem was, I never could find the crack because it was so small. I didn't find it untill the crack got long enough to be exposed from behind the alt.