Problem when starting my car

[EricP]

I have a problem starting the car. When i start the car the combustion comming out of the exshaust is too rich (dark). I have recently changed the oxygen sensor ande the temperature cooling sensor and it's usually a little hard to start in the morning. It has nothing to do w/ my battery.

Could anyone helP?

[LexusRules]

do you have a KA? i heard is possible that KA's sometimes have leaky injectors, maybe a bit too much fuel is getting inside the compbustion chamber overnight?

good luck.