[sideshow]

jump start your car with another car
but have neg jumper cable go from jumper car engine block to ls3 engine block

and the positive jumper cable go from jumper car battery positive terminal to cobra battery positive terminal

it makes it hard sometimes if battery is in boot
and if battery is in boot theres higher chance of bad connections
do u know what size cable u used and is battery in boot
also when jump starting don't use the 20 dollar supercheap jumper leads