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1999 Nissan Frontier sputtering car

Tiny
HSOORAE
  • MEMBER
  • 1999 NISSAN FRONTIER
Engine Mechanical problem
1999 Nissan Frontier 4 cyl Two Wheel Drive Manual

My car sputter badly when I accelerate but then stops when I reach speed. In idle and in nuetral it revs up fine. It seems it only sputters when in load. I changed the fuel filter and checked the spark plugs and they are all firing. Someone suggested the map sensor or the fuel pump. I would really appreciate some knowlodgable feed back and helpful advice.
Thank you
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Wednesday, February 3rd, 2010 AT 12:37 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test all the folllowing 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
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Wednesday, February 3rd, 2010 AT 12:50 PM

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