2003 Oldsmobile Alero Excelleration

2003 OLDSMOBILE ALERO
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ROBBINORTEGA
  • MEMBER
  • 1 POST
2003 Oldsmobile Alero 4 cyl

My Car started excellerating very slowly yesterday and would build up to driving fine. Today my daughter took it and she was driving and stopped and tried to excellerate and it would move more than twenty miles and then slower till she just parked it.

Please help
Aug 7, 2009 at 10:41 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Hesistation problem could be caused by the following:

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
Aug 7, 2009 at 10:55 AM
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