I have an '83 GTI that I am getting finished up. I took it out for a test drive and discovered some odd problems. The engine runs great and pulls hard up to 3500-4000 rpm and then it starts to run strange. The best description would be similar to hitting the rev limiter (on a car that has one), no misfire, just a gentle roughness or buzz. I can somewhat coax it to go to 5000 by little pumps on the throttle . The other problem that I belive is related is I can only turn left . When I turn right the engine dies instantly, if I stop turning, the engine refires on its own and if I hold the turn until it dies all the way it will start up just fine when the car isn't turning right anymore.The tank was 3/4 full. The inside of the tank and the strainer are very clean. I have a new fuel pump and filter. Doesn't make sense to me but I am sure someone here has had a similar problem- Thanks, Chris