The buzzing sound is the idle control valve -- it uses a solenoid that it rapidly opens and closes in a PWM kind of control. That's normal from what I can tell.



Head porting shouldn't affect starting. Have you verified there is fuel getting into the cylinder is my question? This all sounds like EWS to me. Did you take a plug out and see if there is fuel on it? You should have a ton of unburned fuel on it if the EWS is not out of sync. I'm not sure if I read correctly whether you had already verified fuel or not.

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2003 3.0 5MT Topasblau
Purchased in 2016 and sold in 2024
2012 35d Platingrau