Arctic Fox -
Quote:
Originally Posted by Arctic Fox
Forgive me if this info has already been posted somewhere;
My VW Passat has a "secondary air intake". It's a small blower that pumps fresh air into the exhaust, after the turbo, before the cat, and is suppose to heat the cat quicker on cold starts.
At startup, it turns on (sounds like a hair dryer) for about 30 seconds. Sometimes it will turn on again for another 15 seconds.
Just something for you guys to think about.
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I've got one too. It's currently clogged (error code P0410), but I was allowed to pass smog (twice) because it's only a startup failure. I've read that mine won't start up if the coolant is above 140 degrees F. The idea is that the ECU/PCM infers that the engine is still toasty, therefore it will warm up the cat ASAP.
CarloSW2