Au xr6 series 3

[red_hotxr6]

Just bought an au xr6, when its cold, i have to turn the key at least 3 times before it will start,and on all 3 goes there is a definite backfire out the exhaust, once the car is going its ok, however even though i have changed the spark plugs, as the old bosch super 8 looked as old as the hills, its still doing it.

Anything else i should look at..