Thread: What activates the smog pump to engage?
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Old 11-21-2012, 05:32 PM
pmckechnie pmckechnie is offline
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Join Date: Jan 2003
Location: Matthews, NC
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On the 116/117 engins (maybe others) the pump only comes on a few seconds after a cold start up for 10 to 15 seconds to help heat up the catalytic converter. It doesn't come on again until the next cold start up.

Paul
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