I just bought an 87 Caballero and on my way home with it I stopped and put gas in it and noticed pressure in the gas tank. the place I bought the car from had just replaced the carburetor that was on the car because it was dumping fuel into the engine.I replaced the gas cap with a new vented cap . I’m hoping it was just that simple. I was wondering if this car/truck could have came with a non vented cap because it was fuel injected .