my car is belching white smoke and revs go very high on its own
White smoke is not good, usually means a blown head gasket, idling up is just the computer is trying to clear the exhaust so the O2 sensors can work, O2 sensors don't like coolant and it can ruin them, so take it to a shop you trust and get checked and repaired and then see what the computer says is out of specs with anything else.
Search Hyundai Tucson Questions
Hyundai Tucson Experts
Related Models For Sale
Used Cars For Sale