Anybody had dealings with a vauxhall missfire

I would of said coilpack intially .... but i know they can suffer with poor fuel pick up issues also glitchy software has it been updated .... and dont rule out egr valve if its not closing properly it will lean it right out ...

I forgot about the cats .may explain why its ok when you rag the granny out of it ....

Just took kids to school and it drove fine. Six mile round trip .
But i know if i drive the same tomoz it will probably missfire at some point during the journey. .

Completely random. .

basics bob you know the score

disconnect all electrical connections clean and water seal especially this time of year as that's when you get dry joints and bad connections

if above fails and its a patent coil pack fitted then could still be that which is faulty as they commonly cause intermittent misfires which will be stored in kam
also as gostek said with regard to ecus overheating is very true
ive seen them blow before on astras where the injector circuit in one case was not allowing injector shut off so was pumping neat fuel literally out of ex tailpipe so replacement ecu cured the prob but check all earth connections before fitting as the Vauxhalls are notorious for ecu earthing problems aswell.

wont be a collapsed cat or blocked ex as the more you put your right boot down the worse it will be as back pressure will just build up but car will be fine if acceleration is gentle and steady throttle held

theres a bit to be getting on with anyway