Hi I need some help. Have a manual 2012 Civic done 86K Km. I have couple of issues,
1) Engine sound has changed a bit, it is sort of heavier. Have got tuning and plugs change from Honda City at 80K.
2) Fuel consumption within city has dropped from 10.8 to 10. On motorway the fuel consumption stays the same.
Car acceleration has no issues at all and car runs just fine. Engine response is good.
3) When i start the car in the morning, even though i keep it on for couple of minutes and engine temperature is at optimal. Still on first 1 or 2 turns where i have to stop, shift to 1st gear and make a turn, the car suddenly vibrates. After that it gives no such issues for the rest of my journey. This happens only in the morning, but when it happens the engine temperature is at optimal so it is not cold.
4) When car is at idle and stopped, I turn on the AC, I head a sound sort of like khar khar (faint sound). As soon as i press accelerator a little or car starts running in first gear the sound disappears.
Will really appreciate if experts can give their opinion before I take it to a workshop. As I said, car acceleration, engine response are just fine and there is no change. AC is working just fine.
Just to mention one more thing, right now I am running car Shell VPower and have a complete tank full of it. But the engine sound, vibration problem started appearing a couple of months back.
