2008 Pontiac Torrent

Engine Performance problem
2008 Pontiac Torrent 6 cyl All Wheel Drive Automatic 40,000 miles

Sometimes when I press the accelerator my car sputters but it has never done it past 60mph and if I press the gas all the way down it will stop!
January 2, 2010.

Check and test the following things below: Oxygen Sensor
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include: Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
Coil and Rotor

Jan 3, 2010.