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Discussion Starter · #1 ·
2009 Malibu 3.6 108k miles

Car has been having a pretty shaky idle recently, and recently has developed a pretty bad rattle that can be heard in the video. Even more recently the car has stalled twice coming to a stop, and the video below shows me starting it up again after it stalled and revving it to about 2.5k rpms to hear the rattle with a completely unexpected stall afterwards. if i had to guess it'd be timing chain issues, before the car was amazing and worked perfectly. any help?

two very scary sounds from my engine
 

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Have you checked the codes to see why the check engine light is on? It's very hard to diagnose the problem by the video, but it doesn't sound good! Maybe a VVT issue, didn't really sound like a timing chain problem. I would start by getting the DTC's and then go from there.
 

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Full shop level code scan of all 4 code families is step one. Otherwise your just throwing darts.
 

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Discussion Starter · #4 ·
I just read the codes in my garage (since I don't want to risk starting it anymore), and the vehicle is showing 5 codes: P0336, P0496, P0016, P0017, and a P0018. From what I've been told the P0336 is one of the more serious codes you can get.
 

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P0336 definition: The engine control module, ECM, has detected an improper/irregular voltage coming from the crankshaft position sensor. Issue Severity: SEVERE – Stop driving immediately. P0496 is set, it means that there is an issue with the purge flow in the EVAP system. When a P0016 OBD-II generic code is triggered, it alerts the driver the Diagnostic trouble code (DTC) P0017 stands for “Camshaft Position B – Camshaft Position Correlation (Bank 1).” at the camshaft position sensor (CMP) for bank 1, which detects camshaft rotation, is not corresponding to the crankshaft position sensor (CKP) signal.
 
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