I have a problem with my TPS. I'm getting engine code 7, and when I got the car the TPS was unplugged. I plugged it back in, and the car idled bad when warm, so I'm installing one from a parts car. TPS @ closed: .44-.47 TPS @ open: 4.25 I'm still getting the code. What could be wrong? I'm taking the voltage between the middle wire and the negative terminal on the battery. I'm going to go out right now and check to see if the TPS has a good ground. Only thing that I can think of is that TPS should be .5V closed. Is this true? I've read .45V and .5V.