'95 VS V6 back firing on LPG and missing on petrol.

[pjdm1980]

We change the rocker cover gaskets on the '95 VS Ecotec wagon and as some as we put it back together we drove it through a auto car wash to clean the underside and it started play up so we changed the coil packs, DFI module, leads, plug, all the emissions are connected and the computer has log two faults TPS fault and cam/crank sensor faults I'll change them tomorrow as I'm running out of ideas.....
Any help would be apriciated.

[Jxw]

water possibly in where it shouldn't be after the car wash? let it dry out and see if it comes good, one of my vn's does this if i wash the engine or accidentally take it swimming through a big enough puddle (anything that is deeper than the sills)

[pjdm1980]

Pulled the plugs out today to do a compression check and found a crack in one of them, so seems I was on the right track with plugs and leads but I must have cracked a plug whilst installing them.
Cheers Pat

[Jxw]

nice easy fix then

[pjdm1980]

Luckily, I was about to shoot myself!
Considering it was only meant to be a 30 minute rocker cover gasket job.