charging problems

It sounds like you have a drain. Start pulling fuses with a test light on the end of the negative terminal. Touch the test light to the battery as you pull fuses. It helps to have a friend pull while you watch or vice versa.LOL You'll find out which fuse circuit its on. What is your battery voltage at dle? My coupe is running at 13.7-14.0v(stock pulleys) and the battery is in the trunk.

I have this same problem on my vert. I pull the fuse if i know the car is going to sit to long. I'm pretty sure the drain is from the people that installed the alarm, something is screwed up because its on the power windows and locks circuit. I also didn't install the 3g alt correctly on this car. I basically connected the two orange and black wires and was done and didn't upgrade the ground when i installed the battery to the back. It produces 12.9v or so at idle(with U/D's) Now that the coupe is done (well for the most part) and is my DD, I will devote more time to the vert.

Check for a glovebox, vanity or trunk light that is staying on.

To test for parasitic draw, be sure all of the accessories and lights (interior and underhood too) are off. Disconnect the negative battery cable and put your meter in-series between the disconnect cable and battery post. With the meter set to measure current-draw, you'll probably see 100+ mA on the meter. Do the fuse pulling [as noted above] till the reading drops. Then dissect that particular circuit further till you find the source of the draw.

Most meters have about a 10 amp capacity ammeter. Don't power anything up or you can blow the meter's fuse or hurt the meter.

Good luck.