Click here to enlarge Originally Posted by chrissn89 Click here to enlarge
Ok so today i had a look. My spark plugs by the look of it are the original ones. I went into my local auto electrician to see if they had any, and they didnt. They also think there original ones aswell. There an NKG (think thats it) but they've also got like a twin spark kinda thing happening. Two little sparky things on the spark end. So 148,000km out of the original plugs not too bad. Also the leads look like the original ones aswell.

Leads:
Went into autobarn and they wanted $148.
WalkersAuto and they wanted $145.
Went into holden and they wanted $190 Click here to enlarge even the guy at the spare parts desk said hope your feeling rich. Also the coil pack about $190 aswell (from holden).
Ive never brought plugs or leads before but i guess im not gonna get much change from $300 bucks.

Cheers for all the help guys, im hoping the problem is just plugs and leads!!
hey mate, if u r still on original plugs, I suggest changing them first. Dont change your leads as yet as they should last at least until 200,000km but you never know. Get the leads from Holden as they would be a better fit (try get a discount..I find if u ask for a better price, some dealers are willing to do it).
U can get the plugs also from Holden for quite cheap or from a place like Burson or Repco. Burson is cheaper.