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How much smoke, lots?
I will do my best to assist you. When you are finished please click on accept only if you are satisified. I don't get paid unless you do.Please do not accept if you cannot leave positive feedback. I don't know if you are a tech or a just working on your own vehicle so we may have to fine tune the answer. I only know as much about your problem as you have told me in your post, so my answers will be based on what you tell me so please add all the details you can.
lots of smoks more like fuel vaper to me
OK, white is usually coolant that blows white, fuel is black.
I did have a problem with coolant leak but i dont understand why the exhaust smells like gas could it be cadillac convertor or something as simple as sparkplug or wires
No, I really thing this is coolant. When it is burning fuel, the smoke is black and soot.
If the conveter was bad it would restrict flow. Take all the plugs out and see if one is cleaner than the rest.
could it not be a cracked head or head gasket?
yes, that is what I am thinking. Looking at the plugs may tell us which side.
thank for you info. will take your advice may contact you later