I know... But I can't find a thread with a solution to my problem.

[jlevie]

The IAT sensor is part of the AFM. Unless someone had a mixed gas high temperature flow bench the only test you can do on an O2 sensor is to say if it is dead or not. The O@ sensor is scheduled maintenance item with a replacement interval of 100k.

Assuming the smoke test was properly conducted, with what you have tested/replaced my next suspect would be the injectors followed by the DME. The injectors can be professionally rebuilt and flow tested. The DME would just have to be swapped out.

[Coy325i]

Thanks for you help. Actually, I replaced the injectors with 19# injectors about a year ago. Once the computer figured things out, they've worked quite well. They improved my performance and improved my mileage quite a bit, but they didn't make any difference in my rough idle.

The original issue, poor idle, is finally fixed with this new temp sensor. Now if I can just get the cold start/idle figured out, I will seriously be elated with this little car.