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      10-22-2019, 01:21 PM   #15
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Drives: BMW X3 35i - 2013
Join Date: Apr 2018
Location: Toronto

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Originally Posted by Wgosma View Post
Maybe there is an air delivery problem- sounds like the fault codes need to be read again, those cleared mass air meter codes may well have returned, which would point to problems with mass air meter- defect operating mass meter could certainly cause erratic idling/motor RPM and also trigger check engine lamp, improper air/fuel ratio could throw off tailpipe emissions, cause slight mis-fire. Incorrect air/fuel ratio can cause poor combustion which in turn makes engine run rough, etc.

Hello, can anyone tell me what is this big black hose ? I just found it to be open ! Is it supposed to be open ? Or is this the cause of these MAS error code and shaking ?