like my title. is a faulty cold start valve responsible for a little longer start up time in the morning regardless of the weather outsude? My 560sel takes a bit of time to start up in the morning. on rare occasions it will not catch and i will have to try again. My 420sel is quick to start, doesnt take much time to start it. I have replaced the fuel filters on my 560sel already.

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6