idle and constant speed problem getting worse

[Popeye_6]

Hey all,

My slight splutter at idle is getting worse. was sat in traffic earlier and the idle got very rough, sounded like the car wanted to cut out. quick blip on the throttle sorted it, but it came back a few mins later.

its also doing it more often at constant speed low revs, around 2krpm whether im poodling around town or holding 60mph in high gear.

i replaced the icv today, but it seemed to be a bad part because the idle was all over the place with the new one. i checked for air leaks but there were none, fitted the old one and it went back to how it was before so got to wait til the new one comes in.

ive been reading up and it seems like its either this or the MAP sensor.

is there a reset procedure you have to do when putting a new icv in or should it just be plug in and off you go?

thanks