1991 Mazda Protege My car is lugging and when i press the g

1991 MAZDA PROTEGE
95,350 MILES • 4 CYL • 2WD • MANUAL
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BMXERTRAV
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I have a Mazda protege LX 1991 and i recently replaced my spark plugs because my car was lugging really bad when i pushed the gas pedal and idle'd well after the spark plugs were put in it fixed the lugging when I idle and partially press the gas pedal but when i push my gas pedal half way down or More the sound of my car sounds throaty and it runs really rough and LUGS and i need to know what could be the problem with my car? please help me so i can go buy the parts ect. Thank you.

- Travis
Jun 27, 2009 at 7:51 PM
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RASMATAZ
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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
Jun 27, 2009 at 8:02 PM