Originally Posted by Street 308

how big an amp and sub you got, i had the same problem because the little altenator in the early 6cyl commodores does stuff all! i ended up using a 125 amp vr v8 altenator and when i was testing the 2 15inch subs out in the shop the stereo was twice as loud as before at its best and the head lights were twice as bright 2 scared the hell out of the asians in the shop getting a new battery lol! or the battery might be old and not keeping that bit you need for the stereo to run flat out but the car still will start! i still think it would be the altenator, turn the steroe up and check how many amps the altenator is charging at should be around 14