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Jeff NJ Jeff NJ is offline
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Join Date: Nov 2013
Location: NW NJ
Posts: 1,187
First and foremost, sorry to hear about your Dad's diagnosis.

With respect to the thermo time switch on the blue vac hose, I just reinstalled that on my car and it simply advances timing about 10 degrees for about a minute. This raises the RPM a few hundred rpm on my car so that it runs better when stone cold. It really doesn't help starting, I wouldn't think and certainly doesn't do anything once its a little warm. The CSV is what gives it that splash of fuel to kick it over. Once its started, then the advanced timing does help to keep it running better when cold.

I have found that whenever my cold control pressure was too high, it was hard cold starting. What are your AFR's at cold start? Your idle AFR is good, but that really isn't indicative of the CCP being in line.
1988 930 Venetian Blue
Old 04-24-2017, 09:48 PM
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