Well ... this is certainly an interesting little discovery....

After my initial problem getting the check engine light on the SRT6 roadster I just recently bought (preventing me from passing the emissions test, to get my plates transferred over to it!) -- I tried a forum member's suggestion to take out the K&N filters and clean/recharge them.

They were a little dirty, but not horrible ... but I got them cleaned up like new and used a recharger kit on them. Reset the code and drove around for a week or so.

On my trip over to get the emissions test done this morning, guess what? Check engine light comes back on! Argh...

So back to these trusty forums I go for more suggestions... Got the idea this could well be caused by a small vacuum leak, so I started looking all over under the hood for a possible culprit. Didn't spot anything, but I did suddenly notice a little white plastic box with 2 sets of bundled wires coming out of it. Sure didn't look like anything that came with the Crossfire originally, so I got a stubby screwdriver out and was able to unfasten the box to pull it out and see what it was.

Turned out it was this:

Flex-Fuel Conversion

So maybe THIS is my whole issue! Looks like someone did a conversion on my car to run on E85! (I've been putting 93 octane premium gas in it so far. We barely even have any gas stations selling E85 here in St. Louis, MO.)

Anyone know more about this particular conversion? The website talks about the box simply plugging into existing harnesses, but honestly, I can't see anything easy to just disconnect here. All I see is where the guy has the wires off the thing zip-tied as they run down under the engine until I can't see where they go anymore. And the website doesn't even tell you anything about how to install one of these systems. It only refers you to mechanics who install them for you.