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Discussion Starter · #1 ·
Chasing down and replacing all the vacuum lines and a cold start problem. What is this on the driver's side fender under the fuse box with the two black fittings and the one silver one?
 

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That one turns the smog pump on and off. It has nothing to do with a cold start problem.
 

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Actually, the AIR pump stays on all the time and that's just a electrically controlled valve that diverts the pump's output to the silencer-muffler on the air filter housing or send the air into the ports at the exhaust valves.

Your smog pump isn't actually pumping air into the exhaust system 100% of the time.
 
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