I've had my smart for a couple weeks. Three or four times I've head a whining noise when the car starts. Only lasts a couple minutes, but it frightens me. Is something wrong?
...thanks Peteinlongbeach for the following cutNpaste...
It's an air pump for exhaust emissions. It pumps air into the exhaust manifold to help complete the combustion of the richer fuel mixture when the motor is cold, and to help the catalytic converter heat up faster for better emission control.
It's an air pump for exhaust emissions. It pumps air into the exhaust manifold to help complete the combustion of the richer fuel mixture when the motor is cold, and to help the catalytic converter heat up faster for better emission control.
There was some debate on this recently so I looked it up. It's listed in the technical spec manual you can download from this site and works exactly as described in the quote. Smart refers to it as "Secondary Air Injection."
Last edited by jetfixer737; 02-07-2009 at 01:36 AM.
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