Originally Posted by
Indigo46n2
This vacuum is causing misfire on 4 cylinders and it is loud under acceleration. Can't find the source with the hood up, sprayed every gasket and hose I could find. No smoke machines available near me.
With a rubber hose (fake stethoscope) behind the Intake manifold (bottom of CCV) I hear very slight wind, I cant spray underneath and upwards there but everywhere else around the housing seems sealed.
Is this normal? Or should I go ahead and replace the CCV. I've read it can be the source of many problems when clogged or leaky. Any tricks for diagnosing that doesnt require a BMW manometer I can't seem to find anywhere online?
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