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Old 08-07-2012, 08:59 AM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 2,144
Mein Auto: E23;E30;E38;E32;E34 +
If the vacuum tube was from the fuel rail: You will have had an air leak so unmetered air drawn in - tending to run weak. The normal fuel rail pressure should not be affected one way or the other at idle. When there is a decrease in vacuum (on acceleration) this will cause the fuel rail pressure to raise and then give a richer mixture - until the higher vacauum is restored.
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