1994 Nissan Altima Hesitation when going up hills

1994 NISSAN ALTIMA
220,000 MILES • 4 CYL • FWD • AUTOMATIC
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MSHANNON
  • MEMBER
  • 1 POST
When engine is warm it hesitates some times when going up hill. I have just had the fuel lines and filters cleaned hoping that would solve the problem, but it did it again the first time I got it on the expressway.
Feb 12, 2010 at 9:54 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Inspect and test all the following listed below:

Oxygen sensor
Catalytic converter
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)
Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Cap and rotor

Note:If it doesn't apply disregard.
Feb 13, 2010 at 2:41 AM
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