Lumpy and stalling on idle???

[tiger6791]

Drove the car on Sat and it was running fine, parked up for about 40 mins and then went off again.

At 1st set of lights I noticed it was lumpy and idling at about 500-600 revs and hunting a tad.

Carried on to see if it would clear, no better but now if I dip the clutch and it falls from about 3000 revs it drops all the way and stalls.

After testing noticed that if the revs drop from about 1500-2000 revs it drops nearly all the way right hand red light comes (can't remeber which one that is) on and it then struggles and recovers to 500-600 revs?

Any ideas??

[HeyAndy]

Stepper Motor might need cleaning. There's been a few threads on similar problems before where the stepper motor has been the culprit.

[tiger6791]

Yep, I should have done a search, doh! its early and Monday.

So Stepper motor, lambda sensors + others.

Might have to go to garage.