Silly question but... change timing after swtiching ECU?

Bewy said

Not much info....
Check the p/up air gap. Should be 0.006-8". Check shaft for movement, make sure it is not closing this gap.

Click to expand...

Long story short the car was turning on, doesn't matter how long warming up on the drive it would stall after 300 yards to a mile after start driving. Not a chance to make it work again, the only way was to wait about 5 min and it would turn on and work as normal for the rest of the day without any issues.

Replaced the ICU yesterday and it started straight away (ig got to a point where it wouldn't start straight away as well) and loads of smoke from the pipes that wouldn't happen / never happened before, I turn the car on almost everyday. That's was very strange already.
Went for a quick drive and it seems to even have a better response but it's popping a lot.
Didn't touch anything else carburettor wise or anything. Had the voltage regulator replaced as well.