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Re: Secondary Air Pump
Posted by Jim Moore (more from Jim Moore) on Tue, 20 Jun 2006 09:18:59
In Reply to: Secondary Air Pump, johnny F, Tue, 20 Jun 2006 08:09:00
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Generally speaking, the Secondary Air Pump pumps fresh air into the exhaust manifold to reduce emissions during the first few minutes of engine operation. Once a certain temperature is reached, it is usually shut off. At least that't the way it works on my NG900, which uses an electric air pump mounted low in the L.F. fender. You wouldn't notice any difference in performance whether the pump is working or not, except that once you get a CEL, performance may decrease because the ECU is detecting an abnormal condition.
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