So as most of you would be aware i've had ongoing issues with my TB42 petrol fouling plugs on start-up and running super rough for the last 8 months. Long story short i have replaced a crap load of things in the last 8 months and on friday i put new plugs in again (third time). When i used to start it, it would rev low and then foul a plug. It revved low last night on cold start and i managed to press the revs up before it fouled the plugs, it did it again this morning, luckily didn't foul the plugs

So now i am 100% sure it's the auto choke playing funny buggers. It doesn't do it all the time, i press the accelerator down halfway quickly before i start it to open the choke up.

How can this be fixed?

Once the engine is warm it runs perfectly fine, last night i kept the revs up at 1000rpm and then it took 5 minutes of driving to come normal. if i didn't keep the revs up manually at idle it would drop to 200rpm and almost stall.