Idle missing - '86 100q

[Eyvind Spangen]

My car is missing when idling when warm.. When I drive, it runs great.
It also starts and idles great when cold, but when idling warm, it
misses and sputters. This is an '86 100q, Euro model with CIS (no O2
sensor) and engine code KU.. Any ideas? Cap and rotor are almost new,
plugs look ok too, but the PO installed Bosch Super 4 plugs, I've
heard something about them not working very well in these engines, is
this correct?

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E. Spangen
'86 Audi 100 2.2 CS quattro