I have a 1990 Ford Mustang LX and while I'm driving the car, a little bit of smoke comes out of the vents while the car is running. What could cause smoke to come out of the vents?

I have a 1990 Ford Mustang LX and while I’m driving the car, a little bit of smoke comes out of the vents while the car is running. What could cause smoke to come out of the vents?

I have a 1990 Ford Mustang LX and while I'm driving the car, a little bit of smoke comes out of the vents while the car is running. What could cause smoke to come out of the vents?

If smoke is being emitted from the side vents, it sounds as though you may have something leaking in the engine compartment, such as oil leaking from the rocker covers onto the exhaust manifold.

—Jerry Ives
Assistant Professor, Parts Technology
Alfred State College, Wellsville Campus

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