Just looking to get some quick feedback on an interesting issue my daughters car has been having. Patient: 2000 Ford ZX2 2.0L Symptoms: Start cold - starts just fine and goes to high idle As idle slowly drops, it starts to cut out, then try to catch itself. As the idle continues to drop it gets to the point when it cuts out it can't re-catch and dies. Once warm, it starts and idles just fine. If cold and you start it and put it directly in gear, it won't die and idles fine Even when warm, when you put it in gear, it jumps to 1100 rpm...which seems kind of high What I have done: replaced vacuum lines replaced Idle Air control valve What I am thinking: I am wondering if there is a temperature sensor going bad somewhere in that the ECU thinks the engine is warmer than it really is on cold start, so it it trying to cut the idle down too fast, causing the stall. Any thoughts?