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Old 09-10-2016, 12:23 AM   #6 (permalink)
cv129
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Join Date: Jul 2011
Location: Dallas, TX
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Quote:
Originally Posted by lkh5650 View Post
Thank you for your reply

it was hard to tell... It was periodic, every 1 second or so, very loud knocking sound and in between the period the sound was still there but not as loud/pronounce
I didn't feel extra vibrate/shake
I think it was coming from somewhere between mid center to back center of the car..
Are you on the OEM plastic shield or the Z Speed aluminum shield? When my OEM shield gave and the middle 3 tabs were gone, disturbed air flow flapped the OEM under shield but only at a high speed, and stopped as I slowed down.

Sorry that's all I have to contribute, best of luck
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