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Old 07-18-2019, 04:33 AM
abscate abscate is offline
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Join Date: May 2014
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Mein Auto: 2006 BMW X3... VOLVO... V
You canít trace a vacuum leak with a gauge. The amount of leak needed to kick out a fuel trim code is very small.

If you monitor the short term fuel trim at idle and at 2500 rpm it will tell you If unmetered sir ( vacuum leak) is happening.
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