Idle issues when cold starting

[trotter]

Gents,

Strange one this as it only happens when she\'s left outside overnight rather than a garage.

Fires first time, revs go up to 2k or so (as always), after a few seconds the revs start dropping towards 1-1.5k (as always). However sometimes they drop right below 700 or so and she hunts for a second then goes back up to 1k. Happens 2 or 3 times then all is well again.

I also noticed that if i depress the clutch as the revs drop she cuts out completely. Relatively new Magnecors but I know spark plugs are due a change soon. Could this be the problem? I\'ve not touched anything under the bonnet recently so couldn\'t have knocked the TPS / idle sensor.

Any ideas?

Cheers

graeme

[a.tapos]

if the revs are going up and down before it settles sounds like a very small air leak as the idle valve will try to pull the idle down after the air leak takes it up
Though that said id check the warm up system on the throttle body to see f thats moving or sticking they can cause idle probs if not set up/working right