my car is whole stock and totly petro driven till yet no cng . few days back i notice taht my car is on rich fuel on cold start ? any slution
Most Toyota cars are like that. Nothing to worry about.
every car is like that.
Its auto raced - otherwise engine will shut down.
BTW - Your car should have thermostate so it can attain optimal temp soon.
its normal! in morning when engine is cold ECU ignores the oxygen Sensor and richens the fuel for a easy start! it becomes normal when car gets hotter and hotter till it reaches optimum temperature!