I have little experience troublshooting injected cars. But what I do know is that the ECU will fuel the car according to engine temp. So a cold engine gets extra fuel and there's a sensor in the cooling system which provides that input.

If the sensor isn't working properly and the engine is warm, but the ECU thinks it's cold, it will over-fuel. So that's where I would start looking.


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4