I have a 1979 mercedes benz coupe, It starts with a shot of starter fluid, I've drained the old gas and put new gas, switched out the fuel filter, and the fuel injectors and it still wont start up on its own when it turns over it runs fine no shaking or anything. I'm new to a lot of this what could the problem be? could it be the distributor? or the distributor cap? would a bad distributor cause your car to only run on starter fluid? Please any help would be great!