Quote:
Originally Posted by TheDon
How often does the air pump cycle?
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Only at cold start up for about the first 30 seconds or so until the cat warms up. It's only purpose is to lower smog emissions at start up.
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Paul S.
2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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