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If you have HPTuners. Post a log. More than likely I can GUARANTEE all the tuners you went to just tuned your car for MAF only. You need to tune in the VE tables. If you don’t it runs like ****.
If a valve spring was broken, you would think it would have issues at idle. Especially a noise you can hear.
Go over to HPtuners forum. And search Greg Huggins. One of the most knowledgeable tuners I’ve met. He made my LS3 stage 2 BTR cam drive 100% stock.