Contour Enthusiasts Group Archives Forums General Troubleshooting ECT sensor?

When I start my car in the morning (cold mornings here in Northern Indiana) the car searches RPM and will not idle correctly. It will shoot to 2000 RPM and then shoot down to 500 and almost die then shoot up again. I also have the CEL for enfine running lean. I have suspected the ECT sensor is bad for a little while because of another small problem that happens every so often. I am wondering if the ECT sensor could cause the engine to run lean. I searched and saw that it can cause it to run rich but did not see anything about being lean. Any help is great,

Thanks.