1996 Mitsubishi Montero fuel problem?

1996 MITSUBISHI MONTERO
187,000 MILES • 6 CYL • 4WD • AUTOMATIC
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TPKYLE
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  • 1 POST
i have a 96 mitsubishi montero, high mileage. starts right up when you turn the key runs mint, like brand new until you push the gas pedal. its fine til about 2000 rpms then it just revs up and down back to 2000 and cutting out over and over again
Jan 10, 2010 at 10:32 PM
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RASMATAZ
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  • 75,992 POSTS
Check and test the following:

Oxygen sensor
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
Cap and Rotor
Jan 10, 2010 at 11:35 PM