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      01-23-2018, 06:47 PM   #4
taranfx
Z4 35is
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Drives: 2011 Z4 35is || 2016 435i
Join Date: Apr 2016
Location: Santa Clara, CA

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Quote:
Originally Posted by Havocsteve View Post
I'm not throwing codes or CEL but I have the rough idle and cold start. I already replaced the VVT motor but I installed it wrong and I think fried the new part. I'm saving for it again but this time taking it to my indie mechanic because it took me 9 hrs the first time and messed it up. Lesson learned but it's ok to drive with the VVT not working (the vanos and such still works as intended but you lose the fuel eco and a slight delay in reaction time when throttle is pushed). But do replace the items needed before modding.

Might want to do a valve cover gasket and VVT gasket. There could be other parts that need replacing but those are the basics.
Thank you so much for sharing your detailed experience. Will definitely follow your advice since I also have a 1-2 seconds delay with throttle.
Out of curiosity, at how many miles did your's fail?
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