No, it's a stock car. The CAT was replaced about 3,000 miles ago, as the check engine light came on and gave an error code for the cat. Covered by warranty. Imagine someone that is learning how to drive a manual for the first time and they look like they are riding a bull. THat's what it's acting like. It's like driving your car and doing a house beat with your foot on the gas. Fuel pump checks ok when I looked at it. I can only think of a relay or a fuel pump. Help if you have any more suggestions. THanks.