My check engine light can on and my 1999 Ford Winstar van did not want to start. It finally did, so I took it to the local mechanic whom I had never been to before. It was the Mass Air Sensor. $200 for the part, he told me, $70 labor. I checked at Autozone and got the part for $129. It was located in the air filter. Took me about 45 minutes to change it.
Weasels!