TributaryVikings

Oh, I don't know....I'm building a 1/4 wave T-Line for a 15 and it's about 16x17.25x48 with a 7.5x14.5 opening....= about 110 sq inches....I am considering making it 16x19.25x48 to increase that to 123...Either way the port length = about 80 inches long and that may fit in the trunk??

Could be a diode going out on the alternator?

Sounds good to me...I've also seen 'older' hondas have idling issues (less than desired) Causing such things to happen. Other symptoms may include hard to steer-a/c cutting on/off or not producing the difference in ambient temperature that's that great...even engine vibration. Again, this should only occur on AT models and more obviously while in gear as the transmission adds a load to the engine