355 Misfire and strange rpm problems

Started to get strange rpm problems, when i start the car i notice it's not running as it should, feels like missing one cylinder or two, pretty high gas smell also from exhaust back of the car.

When i start driving it's very hard to keep rpms down as it starts to climb without pressing the gas pedal, when i drive it judders a bit from time to time but when i stop the rpm won't go down to idle but stays at around 2000 rpm, after a half a minute it starts to fall down to correct idle rpm when i stand still.

The car is serviced recently and HT cables are replaced, new spark plugs, O2 sensors and new exhaust ECUs.

It seems the car gets too much fuel or like when you run a car on choke as the rpm behaves very strange as sometimes it wants to accelerate by it's own very slowly climbing rpm, could it be MAF?

Yesterday i drove it hard for a long time and the problems went away, but probably it will come back if i start it from cold again......

 

Yes it seems strange, it get stucked at 2k rpm and then moves slowly down to idle, could be the ICVs, i will remove them and clean them up.

 

No i did everything myself, i am restoring exotics so i can only go back to myself

I have cleaned the ICVs now, i might suspect water in the spark plug holes as i forgot to cover the engine the last time.

 

I have checked and replace throttle cable one month ago, can't see any sticking problems, didn't have any issues after that.

The gas smell i've always had when starting from cold, never any issues before, the smell is not from engine bay but from the exhaust tips, completely restored the whole fuel system when i restored the car, however the misfires are a bit odd as they went away when i have driven for a while, could be old fuel from last year but i filled her up recently...

 

Working great now after i cleaned the ICVs, rock stable idle and not sticking, no misfire, could be a combination of old fuel as well but it works now