Honda Insight EX 2010 CVT 91000 km (or 57000 Miles)
Idle is unstable when stopped on traffic lights ( transmission on D and foot on the brake pedal). RPM is around 1000-1100 and suddenly lowers to 400-600 for 5-10 seconds and then goes back to normal at 1000-1100. When I a set the transmission from D to Neutral, RPM goes back immediatly to normal.
The problem does not happen when the car is on Park or Neutral. Setting A/C, ventilation or radio off has no impact on the problem. The problem only occurs when the car is stopped. Never occurs when the car is moving.
I have changed air filter and cleaned air sensor.
Car maintenance for Engine oil and transmission oil have been done according Honda recommandations.
I need advice before going to a mecanic.
Questions
1 What can I try more by myself ?
2. What are the most commons explanations for that issue? Electric? Transmission? Spark plug?
3. Can a regular mecanic take care of it ? Or a Honda dealership (but more expensive)?
Besides, 1000 to 1100rpm in drive at idle is too high! Should be more like 700.
I would get it scanned for codes and start there. It's going to be either an electrical or a fuel problem.
have you changed your air filter?
Cleaned the intake?
