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1996 Pontiac Bonneville hesitating to pick speed

Tiny
RONNIECROOM
  • MEMBER
  • 1996 PONTIAC BONNEVILLE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
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
Friday, October 30th, 2009 AT 10:03 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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
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Friday, October 30th, 2009 AT 10:28 AM

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