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603 Posts
Discussion Starter #1
I was driving my 2012 SS last weekend and while accelerating, the engine light came on, as did all the ABS and traction control lights. A Service Stabilitrac message also appeared in the VID.

I checked for codes and only had a P0300 - general engine misfire fault.

The car was running noticeably rougher. I checked the fuel pressure, vacuum and both were fine.

I did find zero compression in cylinder #3. I took it to the dealer and they indicated that I had a bad valve spring.

They replaced it, and it runs fine now.
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