Last weekend my awesome mechanic got the harness for the CHTS,and the sensor and we switched it(the harness only). I would of put in the new senor but due to lack of time we had to just do the harness. That was a mistake, the next day drove my car on a full tank and got about 230 miles that's average for my car.(87 octane). So to further test I put half a tank (7 gallons). I got 83 miles before the car started stuttering. But the thing is I only get black exhaust when the car is cold. This happened this morning on my way to work. I pulled into the gas station to fill up and of course I don't have my wallet.

Still need to get new spark plugs, I'm sure they're fouled. Probably get some NGK V-power that everyone talks about. This weekend I have to get the CHTS sensor itself out of the car. And replace it. I'll post the part number if I ever find the reciept. The only good thing is that the dealer had it in stock. They never have anything in stock for my car.
Just thought I'd let yah'll know!