Would a dirty fuel filter cause engine surging on a 1999 Pontiac Grand Am GT?
A) Change the filter, $25. B) Have injector system cleaned etc., $100. C) I had a surging problem 45-50 MPH. Battery terminals were corroded. I do not know how it even started. It was the original batt. 129,000 miles, 7.5 years old. I bought the car used in 2005, a 1999 (12/98) GP-GT @105,000 mi. I discovered the terminal problem when I had starting problems a week ago. The negative terminal was loose, and the positive terminal was "solid green/white" corrosion. Cleaned the terminals, replaced the battery, it was due. Behold my surgging stopped, tranny shifting is smooth, mpg & fuel read out is working dead nuts now. Check it out it worked for me. Dennis
1997 PONTIAC GRAND PRIX 3.8L 6-cyl Engine CAPACITIES Engine, with filter..........4.6 quarts  1. After refill check oil level. Do not overfill. 1997 PONTIAC GRAND PRIX 3.1L 6-cyl Engine CAPACITIES Engine, without filter..........4.0 quarts  1. Add extra oil when replacing filter. refill check oil level. Do not overfill. Hope This Helps.
Why does your 2000 Pontiac Grand Am run rough at idle while in gear but runs smoothly if placed in neutral?
Clogged Catalytic Converter 1995 Pontiac I had the same problem with a 1995 Pontiac Grand Am V6 engine so I had a new catalytic converter installed and it still would die out when it was put into drive so the mechanic suggested replacing the fuel filter. After replacing the fuel filter someone suggested checking the fuel injectors because something along those lines caused the initial problem.