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Old 12-08-2017, 07:35 AM   #6
Blue Bowtie
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Re: 96 Wagon Code P0300, running rich

The CTS looks right, and with a warm inlet duct the IAT may not be too far out either.

Did the OČ sensors vary (cross-count) at all or just remain at the 0.25 bias voltage? If not, the sensors may be dead. The higher LT fuel trims are a sign of that as well.

Yes, 10" Hg is really low. Can you verify that with a gauge? 16-21 is more like it at idle. If the vacuum is that low you may have found a big reason. Brake booster and EGR are suspicious, along with the list of other common potential candidates.
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