Vn running wierd after spark plug and battery change over

[lemonjuice]

Hi guys, Long time thread veiwer,first time poster, My issue relates to my 1991 vn commadore v6 sedan, a couple of weeks back id been having starting issues and notice my starter motor was caked in the usual crap,i gave it a good clean and some of my other underbody area (being extremely careful and covering the standard electrical-water no on parts alt/coil packs etc), anyway, afetr that the car ran like it was missing a cylinfer or two and had afew backfiring's a happening,before going shopping (im not a rich man) i told myself i may have just wet something that didnt like, after about a day after the backfires died off then by day 3 shes was all running smooth again so i put it down to that, so,today, (after finding out the starting issue was my battery/dead cell) i bought a brandnew battery,and put in some new spark plugs i had bought awhile back (yes the correct plugs ) now its running exactly how it was when i gave her a clean,although it hasnt backfired at all, its the same power loss/coughing/powerload struggle feeling as before,but with a lot more shake and shudder through the engine,ive tested all my leads and all my plugs and there all pulling spark,i doubt its my new battery as it turns over/powers up accs/HB fine and my alternator was tested a couple days ago and that fine too,im wondering if because i had my battery d/c for such along time in both instances (minus the water if that could contrib to backfiring)is there a chance my ecu is slow to resolve after reset? any information/advice would be greatly appreciated as im not looking forward to taking it to a mechanic$, please >> :help: !!
(edit) i had also found during the SP and battery change overthat 2 of my SP leads had no metal left in the SP plug end and the ends of the spark plugs had a corrosion layer which was suspiciously 6/3 (share a coil pack) i replaced the leads,and also tried running the car without 3 or 6 in to see if it made any difference (much worse) so i can assume the coil pack is fine?

 

[FXST01]

The right plug lead on the right sparkplug?

 

[lemonjuice]

yep double checked firing order




(edit) been going over everything, i still cant figure it out >< hopefully the holden fairies will fix it while im asleep oO ill report back in the morning..

 

[lemonjuice]

So the fairys didn't turn up,so i did the last option which was to put back in the old plugs (even the 2 corroded ones) and she ran fine,so off i went back to super cheap, the attendant held her head in shame after notifying me that they had sold me VL spark plugs >< they replaced them for free and gave me a tradie card (im not a tradie in any respect) ive read staff can be dodgy but after that experience i will definately be self referencing every part regardless of the attendants recommendation or advice at any parts supplier

 

[Brett_jjj]

So the fairys didn't turn up,so i did the last option which was to put back in the old plugs (even the 2 corroded ones) and she ran fine,so off i went back to super cheap, the attendant held her head in shame after notifying me that they had sold me VL spark plugs >< they replaced them for free and gave me a tradie card (im not a tradie in any respect) ive read staff can be dodgy but after that experience i will definately be self referencing every part regardless of the attendants recommendation or advice at any parts supplier

Thats one of the main reasons I go to supercheap, I can look up and select the parts I want, and make 100% sure theyre exactly what I need. Ive lost count of the times someones tried to sell me the wrong part. I always check any parts that I have to order in before I leave the shop.