Cultus Efi 2011Running on petrol.Runs smoothly as long as not stuck in traffic. But when stops due to traffic or on signal RPM starts to rise in neutral gear and goes till 1500 to 2000. This problem observed with and without AC. When road is clear after that again RPM becomes normal until next stop.
same issue was with me, try put grees on battery terminals and tighten them up. try change PCV valve located in the combustion chamber. you may also need to change the spark plugs. hope this may resolve the issue.
