Engine is holding revs between gear changes, sometimes it’s quite bad and when I’m coming to a stop it’ll push on a bit and then when I dip the clutch the revs come back down to idle slower than they should.

It idles nicely but when I blip the throttle from idle, the revs come back down to idle as they should but then they lift again on their own before settling again to idle. It does this consistently.

So far…

I’ve been all over the inlet manifold looking for places it could be drawing air but can’t find any.

I’ve replaced the ICV with a new one.

I’ve disconnected the TPS and it made no difference (I read on here that if it was the problem it would run better with it unplugged).

I’ve made sure the throttle cable is free and not sticking.

Could my problem maybe be the MAP or Lambda, or another sensor?

This is is doing my head right in! HELP? Cheers.

I've checked over all the hoses that I can see that are connected to the throttle body, manifold etc and I cant find an obvious leak.

Is there an easy way to find where air is being drawn in?

Nice one. I'll try to see how it runs with the lambda unplugged tonight.

Would you normally notice a clear difference unplugging the lambda on a car that's running OK? Or is it like unplugging the TPS, when the ECU just reverts to default values?

Can anyone suggest places that I might be drawing air that are hard to notice?

Could be the resonator on underside of inlet either cracked or leaking where it fits into inlet

As for finding a air leak with the car ticking over spray something like WD40/cold start around different areas of inlet and see if the idle speed rises
The leak is in the area you are spraying around

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Red GTB1756 powered Fabia VRS daily driver,LBSC Gti6 eater........

Mac1 ZR R1 kit car build in progress.

Did you reset the ECU after replacing the ICV?

Yeah or just unplug the ECU, for 10 mins or so.