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Is the engine running bad or "misfiring" when it is doing this? It sounds like the beginning of a serious head gasket problem. Or it could just be time for some valve seals. Is the check engine light coming on? I would recommend having it checked by an experienced auto repair technician to avoid possible severe engine damage.
The key is how much smoke? Does the smoke have a smell to it. Are you consuming any fluids, like coolant, or oil?
Tons White smoke that is sweet smelling is usually coolant getting into the combustion chamber.
Less white smoke, especially if other cars are doing it, is normal. For every gallon of gas that you burn, you generate a gallon (GALLON) of water. so this water usually evaporates, but sometimes not. It has little or no smell.
If the smoke is bluish white, that is oil, but usually your converter would fill with oil, and cause error codes, or loss of power. This smell is distinct, but not necessarily sweet.... After the converter heats up, it may be able to burn off the oil and the smoke stops.
What are you consuming, fluid wise, will direct where you go next.
could be the head gasket gone, if you take it to a garage they can do a test on it which will take about 10 minutes, if you are leaking water but not on the floor there is a good chance its going into the exhaust which will cause steam(white smoke) out the exhaust
Smoke is a sign of engine burning oil, which is caused by faulty piston rings, in most cases it's cheaper to have another engine installed in the car, instead of having work done on pistons.
Hope this helps and please rate the answer if it was helpful, it helps me, thanks!
P.S. Comment if you need more advice, it'll be my pleasure to assist you.
check power steering levels i have the same year Gen I-III have a power steering defect PS fluid pumps into system then
out tail pipe, white smoke.Lexus fixed this in later models.. check
lexls.com the solution is there.
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