Here's the problem. My cel came on and threw a code 7. I changed my tps sensor yesterday. Now my car is idling around 2k rpms and blows white smoke. It doesnt smoke bad but you can see it. Also when the car is in motion, when coming to a stop while in neutral the rpm stays at whatever rpm it was in when it's in gear. Like if I was in third gear at 3k rpm and I put into neutral, the rpm stays at 3k rpm and it doesnt drop.????? Please help, I need to get it fixed so I can smog it and sell it!!!!