idling problem on ford Focus

[Digger]

I have a ford focus 1.6 '99 ,72k miles up,that when stationary at traffic lights idles very erractically and sometimes the engine cuts out. check battery 12.48v ,alternator on bat reads 14.89v.The engine doesn't sound as if it is misfiring,
Any suggestions, could coil pack be on the way out?. Would a leak in the air intake hose give this system or dirty MAF ?

 

[tosullivan]

I had a faulty AFM on my car before causing it to idle erratically. Its an expensive swap though at about €200

 

[cozzie bhoy]

Its probably the idle speed control valve. Its on the top of the inlet manifold. Its a cylindrical shape with wires connected to it. Get contact cleaner and spray it up.

 

[Digger]

thanks for suggestions ,will try cleaning both and will see how it goes

 

[Guest116]

Likely to be the coil, they need to be replaced every 60k miles or so.