MY97 running OK most of the day, but when at rest for a while, idle drops right down then hunts it's way back up again.

Blipped throttle to clear and a fair amount of smoke came out the rear!

O2 sensor, MAF or plug adjustment?

How do I check?

Thanks in advance.

Full de-cat, itg (resonator removed), dawes

 

Can't speak for your car or any alleged ITG/MAF effects (see the threads - not mine!), but mine was hunting and the dealer replaced the 02 sensor. For a week it was exactly the same and I was going to go back, but now its back to normal.