What is the problem with my 1994 Cadillac Seville SLS ? Is it Minor or Major?

The car starts without a problem and runs very well. It doesn't lope or miss and when you give it gas it responds wonderfully. It has the North-star engine in it. The problem is it sends out very heavy white smoke out of the exhaust. We changed the Oxygen sensor and this didn't help at all. My guess is the computer. But again, is this a cheap fix or a major expense??
What is the problem with my 1994 Cadillac Seville SLS ? Is it Minor or Major?
White smoke is coolant getting burnt. You most likely have a bad head gasket. Check the oil and make sure it is not foamy.
What is the problem with my 1994 Cadillac Seville SLS ? Is it Minor or Major?
Sounds like you might have a major problem. Most usually when you have a white smoke from exhaust it is a tell tell sign of a blown head gasket.have a mechanic pressure test the cooling system.
Headgasket. Major expense. Do you have water in the oil or oil in the water?

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