Got a 95 Buick a year and a half ago in exchange for doing a tune-up and tranny rebuild on a 98 ranger.
First year no issues but while driving the exhaust blew out at one of it’s hangers so I replaced everything from the catalytic converter back with new.
Ever since I’ve had engine stuttering issues at low acceleration, slow take off from stopped and crappy fuel economy.
I’ve changed the coils and bought new injectors, the problem is when I installed the injectors the car would not start
Thinking it was the cheap gb manufacturing reman injectors I splurged and bought a more expensive set of ac delco with the same issue.
If I swap the old injectors back in the car runs.
Resetting the ECU doesn’t fix the issue.