1993 Lexus ES 300 Stumbles on takeoff?

1993 LEXUS ES 300
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FERNANDEZ_SONJA
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Shakes or Wobbles problem
1993 Lexus ES 300 4 cyl Automatic

Why does my car stumble on takeoff? It used to just shut off. My engine light sometimes turns on while driving. I've had many things changed on it: fuel injector, sensor, carborator, fuel pump. ext......
Dec 30, 2009 at 2:41 PM
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RASMATAZ
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Could be one of the following:

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)


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
Coil and Rotor
Dec 30, 2009 at 5:32 PM