Ok I have my Santa Fe since Sunday 16th of June (Exactly one week ago) Car hasn't been driven on a daily basis but I've had cars like this before that didn't do what is happening now. It's a 2 lt petrol model. My problem is that I was just sitting out in it there checking a problem I have with the key fob. I started the car up and a small amount of white smoke came out. However then I put my foot on the accelerator and white smoke flew out of the exhaust! I haven't drove it to see if it clears up but here's a few things I do know if anyone can help tell me why it's smoking!

No codes came up when connected to diagnostics.
Smell of petrol off the smoke.
Rough Idle.
When I take my foot off the accelerator you can really feel the power going from the car.

Any ideas as to what this is? Thank you

 

1. The head gasket is blown and the engine is allowing coolant into the combustion chambers which turns to steam and comes out of the exhaust

2. The exhaust system is not yet fully warmed up and the steam produced as a natural by product of burning petrol or diesel is exiting the exhaust as visible steam rather than invisible super heated steam