1996 Pontiac Bonneville hesitating to pick speed

1996 PONTIAC BONNEVILLE
190,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
RONNIECROOM
  • MEMBER
  • 1 POST
when I start my car it cuts back off then I start and it hesitates for about 3 minutes t pick up speed when I'm driving. also when I'm driving on expressway it shakes before picking up speed
Oct 30, 2009 at 10:03 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
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
Oct 30, 2009 at 10:28 AM
Advertisement