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Need help please with analysis of logs, RE: P1127

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Old 07-16-2008, 10:08 AM
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Default I don't know much about lamda, but those 1.991 lambdas must be indicative
Your lambda just jumps up like that. I surmise that means a vacuum leak causes the engine to get a huge blast of air that isn't supposed to be there. However, I would think the too much air condition would mean a lean condition, but you're getting too rich, right? Just my thoughts, anyway. Hopefully someone more knowledgable of lambdas can comment further.
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Old 07-16-2008, 02:49 PM
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The jump to 1.991 is when I let my foot off the pedal...
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Old 07-16-2008, 05:45 PM
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Check or replace the vacuum hose which connects to the fuel pressure regulator first.
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Old 07-16-2008, 05:53 PM
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Maybe the hose clip is loose ???
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Old 07-17-2008, 06:15 AM
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Default FPR is in the fuel filter on a B6, but I think it is time to replace vac lines and some check valves
Thanks for the suggestion.
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Old 07-17-2008, 06:17 AM
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I'll check it again, but I tightened it down pretty snug a while back.
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Old 07-17-2008, 05:31 PM
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Oops, I didn't notice that.
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Old 07-21-2008, 02:02 PM
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Default Yes, if the timing retard doesn't stop the knock, then the fuel mixture is made richer ...
to further attempt to stop the knocking detected. 12 degrees is the limit on ign timing retard.
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Old 07-22-2008, 08:12 AM
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Default Wouldnt there be another fault code if it were doing that?
All I have is "System too rich"
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Old 07-22-2008, 06:41 PM
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Not that I know of..
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