Got this unknown issue, that happens on rare occasion.

Rev pulsing
Car: 1.6 16v, 2002, petrol, 5dr

Happens on very rainy or cold day, most of the time when the steering wheel is fully rotated to any direction, holding fully pressed clutch, on 1st or rear gear.

Revs starts to pulse, fast, from 1 to all way down, up again, down... when i give a gentle tap on gas pedal, rev pulsing stops. No errors. On rare occasions rev pulsing leads to engine cut out.

Not really sure, where should i begin to look for a problem. One of the local mechanics suggested me to "re-learn" / "program" a gas pedal. Said that this should fix my problem.

Any ideas or tips for this problem?