So I have discovered that something is awry with my A/C.
Car - Mondeo MK2 Flair 115 hp, Zetec 1,8.
When A/C is not on the car idles steadily and throttle follows the pressure on the pedal.
But when A/C is on, idling is normal for 5 seconds (around 1100rpm), then it jumps to 1600 for a second, then down to 1100 again for 5, up to 1600 for a second etc.
Also when driving I sense these one second burst boosts on the throttle.
A/C doesn't seem to cool much so regassing is certainly coming up, but any suggestion to what's the reason behind the odd throttle behaviour?
Thank you for all suggestions!