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1994 Nissan Altima Hesitation when going up hills

Tiny
MSHANNON
  • MEMBER
  • 1994 NISSAN ALTIMA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 220,000 MILES
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.
Friday, February 12th, 2010 AT 9:54 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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.
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Saturday, February 13th, 2010 AT 2:41 AM

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