I was running short on time, so I broke down and dropped the car off at my local Z Speciality shop. He traced the problem down to the rear carb insulator gasket was blown. Apparently, under heavy acceleration, it was sucking too much air in. It would have taken me a lot longer to figure that one out! So put that one in your Z memories banks if this ever happens to you. Well, I went to an open track day yesterday to test her out. She ran like a champ all day! Woohooo!! I really ran her hard too and had no problems with fuel. I kept the tank full just to be sure. It was a fantastic day. About 87 degrees, with a light breeze. The event was put on by a local dealer that is a Charter member of the Autobahn Country Club. http://www.autobahncountryclub.net/index.html I was surrounded by some pretty fast company: plenty of Feraries, Maseratis, a 911 Carrara a Lotus Elise and a couple of Alfas. The old Z held her own out there though. It's a real hoot to see a Ferari pull over and give you a point by. I passed the 911 too. I am sure this is mostly due to these guys having more money than driving talent, but it was fun just the same. I may have had the cheapest car out there, but it wasn't the slowest!! The owner's son brought a Ferari Challenge car. Man was that car fast!! He's winning his class in the SCCA, so he had the talent to back it up. I put in 5 -30 minute sessions and 1 shorter one for about 140 track miles. Man I love these open track days!! Marty