gday i have a 2000 model vt v6 commodre i have a problem with my motor i was changing the battery and the ratchet accidently touched the teminal and sparked now when i start the car it starts fine then the revs drop then go back to normal then drop again and go back to nomal and it keeeps doing this i took it for a run around the block and it runs fine just that problem of the revs dropping and then going back to normal can someone please help me with this problem and is it alright to still drive it thanks