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Old 04-25-2017, 05:42 PM   #30
lummert
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Join Date: Jan 2008
Location: Portland IN
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Quote:
Originally Posted by whalepirot View Post
that setting requires a gas analyzer but I have the other things; cannot do

I could do this IF there was a port to connect to. Seems I have to make one due to unique Volvo design.

This is a head scratcher. How does the ECU optimize A/F ratio, if it cannot learn? Then, there is the issue of an aging car, as components age and alter that ratio. The ECU must adjust to optimize to maintain emissions, especially for the many years required by law.

After another adjustment of the wastegate ( think it's real close), I drove it some miles today, street and freeway It is improved, except the boost is rather low. I need to reread and understand what can be limiting the boost.
Oxygen sensor. Open and closed loop.
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