1998 Chevy Cavalier Gas smell

I have a question going about this problem now. The one I'm working on started out as a gas smell that has turned into excessive fuel entering the cylinder. As it turns out the fuel was leaking from around the injecters so the owner had someone replace the injectors, after replacing the injector seals. My application is multi port injected. We have decided to re replace the injectors with GM factory parts and a new fuel regulator, posible intermitent high fuel pressure. The owner originally used after market injectors that cost half as much as everyone else was selling them for. Suposedly the new stuff is to be brought here today and I will try to replace the parts this evening. I have also ordered an oil change for this car.

Im no mechanic, my brother has your same car and year, dont overfill the gas tank, that maybe the gas smell and check for fuel line leaks under car, cavaliers are very bad when it comes to power steering and gas lines, also the (very bad fuel pumps.) Before doing all that expensive stuff.( Go back to the basics) check the common sense stuff first. Dont let what other people did take away from common sense. If the fuel isnt leakn from the injectors, theres no problem in my book. If this doesnt solve your problem, provide more details. Good luck friend