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Message: <blockquote data-quote="jabawalkie101" data-source="post: 21066" data-attributes="member: 7705">I have an 09 equinox sport 3.6. It’s has 160k miles.  I have a vacuum leak I’m going to get done but it’s important to note it. I have replaced all camshaft sensors and I still have the error codes “p0017, p0008, p0016, p0018”I am pretty certain I need to do the timing on the engine. I don’t hear any knocking whatsoever. I took it to a shop to be certain of it. And they told me the engine needed replacing. I can upload their report if necessary. Would these signs I’m having indicate timing? The engine is surging at idle only when it runs for a little. Thanks in advance.</blockquote>