The tube I am talking about is the tube between the air mass meter and the throttle area. I have had two of these break on 113 engines where the accordian bellows is permanantly attached to the hard plastic. This allows unmetered air.

As Gilly points out any vacuum leak will cause problems with the performance codes. This is why the adaptive limits that are exceeded must be established from the scanner as the first step.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician