At the last technical control in the 1st month when the controller study eco-test he could not keep the motor rev still, I do not know how exactly 2500 rpm I guess. Somehow engine revs rise. I tried the same thing myself it was the same. The controller asked me did in the driving engine goes in revs? My answer was no, the ride is normal and I have not noticed anything. Idle is normal, rides as always and nothing unusual I can't notice. Since the new technical approaches have somehow solve problem. I tried it today and it is same. I press some throttle, just how much would be enough to keep the engine at 1000 rpm and with the same amount of throttle engine begins to rev until about 4000 rpm. I also noticed that the problem is with the warm engine. When engine is cold everything is normal. Multiecuscan did not found any errors. Is there someone who met with such a problem?

Anybody anything? No ideas?

when was car last serviced and what was replaced..also putting on diagnostic equipment to read any fault codes stored or active in ecu. although you have had it on multiscan which should of showed any fault codes at the time it was plugged in. this information be good to help solve your problem

I hadn't any problems with car until this, as I said this problem in regular drive no exsist. The car was last serviced in august and I did it myself, oil change, filters and spark plugs and nothing replaced on the engine. When I conected multiscan there was a one fault code stored, somthing about low voltage when I had change battery. It was few years ago and this codes was remembered. I erased fault code and no others fault codes showed. I am also running engine at the time multiscan was plugged and no fault codes at all.

so you have had service quite recent...have you tried any injector fuel cleaner stuff you add to petrol..to myself sounds like fueling issue to be up and down at lower rev range as you have change spark plugs n air filter

Yes I had tried fuel cleaner and I am also cleaned inlet throttle, no change at all. A problem was before service. I repeat, only when engine is warm up. When is needle of temperature instrumet almost at half problem is here.

It's possible it's a lambda issue with one of the sensors? Perhaps one of the sensors is giving a bad trace for the ecu and it's trying to compensate by adjusting the fuel accordingly? Dunno, just a suggestion