Potsey

Afternoon guys, well new to the world of lupos after picking up a 99 t 1.4 16v in a superb shade of lime green for the princely sum of £300. It's done 120 k and is super tidy inside and out. Got round to servicing it today, did oil and filter, plugs, cleaned out the air box and throttle body with carb cleaner as they were totally black with oil residue! Before touching it it did seem to hunt around at idle but was and still is fine under load. It does have a slight blow in the exhaust back box, could this be the culprit a it is still hunting about now.