Last weekend I replaced a vacuum line in my vintage 1994 Mercury Sable. The car, which has been sputtering and stalling, ran great. The next day my son informed me that the dreaded check engine light was on. I started the car up and the light was off. Maybe it was a fluke I thought. It must be something that corrected itself, wrong. Took the car out today and the check engine light began it's warm amber glow. I was pretty close to Autozone so I pulled in, popped the hood, and went in to ask if they would read the code. One of the guys, who had been helpful to me in the past, came out and plugged the code analyzer in. Bad EGR valve. Where is it and is it easy to replace I asked. It's right here on the top of the engine and yeah, it's a pretty easy job. Off we go into Autozone where he looks it up and sells me a new one for $42.00. After answering all of my questions I headed home with my new EGR valve under the warm glow of my check engine light. I carefully disassembled some parts and removed the old one. It actually came off without much of a problem. I needed to use a part from the old EGR valve which, after removing the screw, seemed welded to the original part. After trying to remove it, I decided to take it back to Autozone, where Jim removed it for me with a pair of vise grips. A couple questions later I was headed back home to complete the repair on the Sable. The new part went on as easy as the old one came off. Attached a few lines and I was ready for the big test. Started the car, no light. Went for a test drive to check it out, no check engine light. I believe I fixed it with the help of Jim from Autozone and $42.00. Why did I write this all down. I'm waiting for my wife to get home to go to dinner and she's late so I'm killing time.