Running a bit rich and unstable rpm at idle

[Soulcharger]

Having some difficulties with my 2.0Efi engine. It’s running somewhat on the rich side (0.85 - 0.9) and at idle the rpm is unstable, ranging from 900 to 1100rpm. any ideas what’s causing that ? Thanks, Chris

[Jeff Turbo]

Is this a new issue or something that you've adjusted Chris?

[Jeff Turbo]

Try a read https://maestro.org.uk/forums/forum/...diagnostic-kit

[Soulcharger]

Is this a new issue or something that you've adjusted Chris?

It seems just to have 'happened' but I get the Co% right and give it a tune up to see if that solves it.

[Soulcharger]

Try a read https://maestro.org.uk/forums/forum/...diagnostic-kit

When I read the AR tune-up instructions that I should hear a 'click' when taking end of idle plug lead on and off (3 times). Does that click from from the idle plug itself or a relay under the bonnet ? Chris