Strange Idling problem

[SKI]

Every so often (about once a month or so) the car will hunt around 4-600 RPM. There doesn't seem to be any pattern, it usually lasts about 5 minutes and then goes away (I can still drive it, I just have to hold the revs steady with my foot at lights etc). Occasionally it happens if I restart my car after she's just been turned off. I can't identify any pattern in the strange idling. Weather doesn't make any difference. Recently had an intensive service new plugs etc made no difference.

I'm thinking maybe a faulty FCD? Could it be a fuelling problem linked to my Walbro, suggestions welcome. Cheers

[tooquicktostop]

Maybe a slightly sticky Idle control valve ? they can be cleaned up there was a thread on this yesterday I think ;)

[SKI]

Cheers, will deffo give that a look. The cars in for a new radiator tomorrow, will ask them to take a look at that too....

[grahamc]

are you running an induction kit??

[SKI]

No, standard box with TRD filter, recently cleaned :)

[hadyn]

Both supras Ive had have done this. Nothing to worry about imo.