So I took the plugs out today and they were nearly black, smelt like fuel but could be from me trying to start it a fair bit after reseating the coil pack etc.
Noticed that the plugs were different part numbers though.
2x were BKR6EK
2x were BKR6EKB (Same plug just a longer electrode)
bought them 3 or 4 years ago before I knew I needed glasses so that explains a bit. Decided to chuck in a nice set of BKR6EIX NGK iridium plugs as I probably needed new ones anyways however this didn't solve the problem so it has to be the coil pack.
Luckily a mate who used to own a z22se astra was accidentally sent the z18xe coil pack from a company, they didn't ask him to send it back so its sat in his shed since. Gonna try that tonight and if it works buy it off him.
Does anyone know if there is some sort of ignition upgrade that you can do on the z18xe? this will be the second coil pack ive gone through in 4 years, unsure if this part is known to fail so often.
Also one thing I noticed is that there was a worrying amount of oil around the plug threads and some down the plug shafts too, I know when my mate filled it with oil he spilt a decent amount down near the coil pack/plug area, just wondering if this would be leftover from that. Its not blowing smoke and there was no oil residue on the plug tips, also there was no oil residue coming from around the inner part of the valve cover gasket.
Just a tad worried...
Will update with pics later, just on the work comp atm.