ok.. ive kinda been having this problem for a little while now but now its getting on my nerves....

wen i have my air on full blast (cuz its in the mid 90's) at a stop light my cars voltage dips down to about 10 volts which makes my xm cut turn off and then the air slows down.. my car also sounds like it has no juice wen i start it up..

now just about 4 days ago i just had my 90k tune up and one thing they did was a batt. service i thought it would fixx it but no.. the batt is brand new i got it about 3 months ago... what do u guys think it is??

 

Weak Alternator

 

cant be cuz as soon as i step on the gas the volts go up to normal..

 

Your alternator is belt driven....of course voltage goes up when your engine speed increases!!! How do you think your alternator runs?

Replace your alternator.

 

hehe... i kinda dont have the money...