I have this weird issue with my 2011 Mitsubishi Lancer 2.0L SE. When I am maintaining a speed by feathering/light load the accelerator, I get this metallic rattling noise from under the hood. Going 50kmh, 1250-1500 RPM. Some things to note:
- Sound is not present when accelerating or when "under load"
- Sound is not present when revving in park or neutral, only in drive
- Sound is louder on hot, dry days or after the engine has warmed
Any ideas? Mitsubishi dealer is useless and charges me to not find and fix the issue.