Yeah it could be a fuel pick-up problem, something in the tank, water in the fuel, power steering if you have it, if the factory fuel line has been replaced with a rubber hose it could be getting pinched when you turn, a problem with a ground or a brittle wire loosing continuity when you turn and fuel bowels and or float problems. You may only have a ground from the battery to the engine and up until now the engine was grounding to the body (chassis) through some other means and now looses ground when you turn. I know that sounds odd but when you turn a cars steering wheel everything else in the car shifts as well. Check all of these things and let me and Woodz know what you find. My curiosity it getting the best of me.