STi 2006 engine bay question
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#4
isnt some kind of pump seen them on other cars where they pump and heat the water to bring the car up to temp quicker when cold you can normally hear them giving it death for the first couple of minutes until warm
#6
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It's the secondary air pump. This pumps air into the exhaust ports for the first few seconds after a cold start to get the cat working. All about getting through Euro4 emissions.
Mike
Mike
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