That's interesting, a quick web search comes up with these results: the P0271 is related to a bad fuel injector, and the P0010 is related to the camshaft position circuit. Bad or low oil can be a cause. If you haven't already you should download the service manual from this site, and check what the codes mean for the crossfire specifically. I just replaced my crankshaft and camshaft positions sensors - two bolts, two connectors and you're done. I bought Bosch parts for both from Pelican Auto parts for ~$75 total. (Pelican Auto is located in northern California, btw.) It sounds like you're making headway.