1990 Chevy Lumina Hesitation in motor

You should replace the fuel filter also and have the injectors cleaned. Most shops can do a fuel injection service. The best ones are cleaners that are added through a vacuum line. The gas additive doesnt really do as good of a job. Your timing could also be a little out. You might wanna have that checked but the injector cleaner through a vacuum line will give you a huge smile when you drive away. Good luck :)