I have a 2003 Pontiac Grand Prix Gt. Recently the engine has lost some of it's power. I step on the gas, and the engine surges, but takes forever to shift gears. I first thought that the transmission fluid might be low, but that wasn't it. I then thought there might be a bad spark plug, but noticed no difference when I changed both those and the plugs. Coincidentally my check engine light has come on and off a couple of times with a P0440 error code, which has to do with the emission control. Thinking there might be a connection, but don't know where to start.
Feb 22, 2011 at 12:10 PM
