It must be something in the air. I started our 100 yesterday morning, It was running fine, but there was a clicking coming from the front of the engine. I wasn't sure exactly what it was. Got in the truck and noticed that it was then idling very rough, I pulled out of the driveway and it didn't want to move, very rough running. No CEL. I drove it to a local shop about a mile away, they scanned it and it showed a cylinder 2 misfire, I don't recall the code. Coil Pack from Toyota $102, labor $100, thirty minutes later it was on the road again, Never did get a CEL. I should have just put my scanner on it and I would have saved some $$$$ but, I was late for a meeting. I learned my lesson, always check IH8UD.COM before heading to the shop. Thanks to all for the great info. Phil
