Gday guys my daughter has a 1998 VT V6 auto commy that has developed a miss on medium to hard acceleration. it does not feel as though it is starving for fuel in anyway (but could be wrong) feels more like electricals breaking down. Have just replaced the coil pack form a VS that was running ok, the coil pack on the VT died when the boy friend hosed it. Swappped over the leads and plugs from the VS chasing the problem which where all running ok in the VS (both ecotec's 1997 VS 1998 VT). Any suggestions? Could the coil pack have died again? If so is there a reson for this? would the crank angle sesnsor cause this? Any help here would be appriciated. Cheers Barry

could be a crook lead,even though it ran ok on the other car,one may have been damaged internally while removing, coil packs can break down individually I had this on my VT also a hairline crack on a spark plug will cause missing, If a plug gets dropped you may not see the the crack in the porcelan it caught me out once.

There is a way my mechanic showed me , take the leads off one pack and start the car( DO Not touch the leads while its running) have a look at the spark going across if its strong and not trying to arc else where it should be ok, after you have had a quick look turn it off put the leads back on and repeat for the other coil packs only do one at the time, and Dont touch while running !
A weak spark can indicate a problem , a strong consistant spark is what you want.

Thanks cloudy I may get the daugters Boy friend to do this, I belive in self presivation. It was bad enough in the old points days with out these fancy coil packs LMAO. Thanks for all you helf everyone Cheers Barry.