1999 Nissan Altima Engine hesitates

1999 NISSAN ALTIMA
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GOLDGRILLA
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  • 1 POST
Engine Performance problem
1999 Nissan Altima 4 cyl Front Wheel Drive Automatic N/A miles

car has about 250000 to 300000 miles and when it worms up hesitates real bad no check engine light replaced maf sensor helped for a little bit but started it again anything will help
Apr 1, 2009 at 12:00 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
1999 Nissan Altima Engine hesitation 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
Apr 1, 2009 at 4:57 PM
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