2000 Chevy Impala Sputtering

Yes the check engine is on. Since posting this question I have had diagnostics ran and the result was intake manifold gasket gone bad. Manifold itself is intact and good but still an expensive fix. Firestone auto quoted 780.00 to fix. I have since taken the car by trailer to an independent shop owned by a friend and will have it fixed tomorow for a low 300.00! Wow! Still a big chunk of change. Fortunatley the only other thing that showed on the diagnostic test was plugs and plug wires that are being changed out as well.
Thank you for responding to my question though!