There’s a vacuum line with an unknown connection right behind my intake manifold. It’s located on the top side of a connector that extends from the wiring harness all the way across over to what appears is the second air pump. Does anyone know what this vacuum line connects to?
Built year/month, model? Did you check in realoem? http://www.realoem.com/bmw/select.do
please add the details = Built year/month, modelMy Cars: 325Ci
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2002 325Ci
It connects from the secondary air valve to the secondary air control solenoid.
Chris Powell
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The secondary air valve side is connected. The vacuum line is about 6 inches long and less than 1 cm thick. Would that connect to the backside of the intake?
And could this also cause a slight rattle at idle only? Noise wasn’t there before working on the car. Replaced intake manifold gasket and PCV valve which got rid of misfires and stalling. Only issue now is slight rough idle and the duh-duh-duh-duh noise that goes away when accelerator is depressed.
The first step in diagnosing a problem is to scan the car for codes.
No CEL
No CEL is different that not having any stored codes. There are codes that can be stored without turning on the CEL.
ASE and BMW Master Certified Technician
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