weird idle issues

my car when driving is fine no problems but when i let off when coming to a stop in neutral it revs up to about 1200 rpm den settles about 1100 or 1000 or 900! sometimes when i start it when its cold it idles around 1400 or 1300 or 1200. most times than not it is idling funny tho any1 had issues like this before?? Ive had the car nearly 4 years but modded it up over the last year and this was never happening b4................:confused::confused:
 

J25GTi

Lifer
As above, clean you idle control valve (lhs of the inlet manifold) and check your throttle cable isn't sticking
 
checked the throttle cable didn't do the icv yet next on the list looks perfect tho anything else tat can cause issues like this??
 
just checking because the power fc has a funny idle on come down the rev range its down to emissions reasons. just checking to see if it had one and might be confusing it with that

Tim :)
 
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