89 mustang 2.3 concern?

i started up my car today and its kinda cold outside and i started it and it blew a big white puff of smoke....and it smells similar to something is burning...i thought it was a lead gasket but after like 30 second the smell goes away and it runs fine...idk what it could be but it in recent times started and is making me mad...

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Answers:    Most feasible a leaking injector.
A cloud of smoke on starting is not that unusual. But approaching I said an injector is not seating completely and letting the intake flood.
If it bothers you run some systems cleaner through it.

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