Greetings.
First i apologize for my english ( it's not my native language)
I own the car last 3 months. It has 140 thousand km,it is orderly serviced.
The car goes ok, it dont smoke (black) from exsaust,consumption is about 7l/100 km,i think there is no problems with engine. I'l tray to explain my problem and hope someone will have the answer. At this 3 months i noticed this anomaly 9-10 times. I'm driving car normaly,park infront of house (or stop at red light) manual gearbox in that moment in neutral and my idle rpm start vary. It goes up and down about 200 rpm and sometimes is present sound of detonation in engine, like not good mixture of fuel, tuk tuk sound and i felt vibration of car. When i'm infront of house i turn off car and turn on and it's all normal. If i'm on the red light i keep on and after few minutes if i stop on next red light it's all normal. The problem is that board computer dont show any error. I exclude gas problems becouse i changed couple gas pumps and it's the same. It has been on 2 diagnostics and 0 errors, all pipes are inspected for air leakage.I'm traying to collect as much data i can to localize problem. Last 2 times it happend i remember i was open road driving,distance 15-20 km and outside temperature is low 7 ' C (winter time ). When i park,the rpm vary and the car radiator fan vas working full speed , like in summer,when you stuck in traffic. But the car temperature on gauge is always normal,it raises it good and it hold it on middle. Is this two connected maybe ? why does the radiator fan swith in winter, (AC was switched off ). Any help is appreciated . Thanks
First i apologize for my english ( it's not my native language)
I own the car last 3 months. It has 140 thousand km,it is orderly serviced.
The car goes ok, it dont smoke (black) from exsaust,consumption is about 7l/100 km,i think there is no problems with engine. I'l tray to explain my problem and hope someone will have the answer. At this 3 months i noticed this anomaly 9-10 times. I'm driving car normaly,park infront of house (or stop at red light) manual gearbox in that moment in neutral and my idle rpm start vary. It goes up and down about 200 rpm and sometimes is present sound of detonation in engine, like not good mixture of fuel, tuk tuk sound and i felt vibration of car. When i'm infront of house i turn off car and turn on and it's all normal. If i'm on the red light i keep on and after few minutes if i stop on next red light it's all normal. The problem is that board computer dont show any error. I exclude gas problems becouse i changed couple gas pumps and it's the same. It has been on 2 diagnostics and 0 errors, all pipes are inspected for air leakage.I'm traying to collect as much data i can to localize problem. Last 2 times it happend i remember i was open road driving,distance 15-20 km and outside temperature is low 7 ' C (winter time ). When i park,the rpm vary and the car radiator fan vas working full speed , like in summer,when you stuck in traffic. But the car temperature on gauge is always normal,it raises it good and it hold it on middle. Is this two connected maybe ? why does the radiator fan swith in winter, (AC was switched off ). Any help is appreciated . Thanks
