My 1992 Mazda Miata stopped running mid-drive. It seemed to be out of gas but would start long enough to go about an inch if I turned the key ALL THE WAY off, not just to run. I checked the fuses and replaced the fuel pump, now it cranks and turns over intermittently but will not start. Oil is good, gas is half full, battery is good as all lights are bright. Any ideas please help.