1993 Toyota Corolla BUCKING

Tiny
JKCOROLLA
  • MEMBER
  • 1993 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
WHEN YOU TRY TO ACCELLERATE THE CAR BUCKS
AND TAKES LONG TO REACH THE DESIRED SPEED
EVEN AFTER WARMING IT UP SEVERAL MINUTES.
Saturday, October 17th, 2009 AT 5:27 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be one of the following 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)

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
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Saturday, October 17th, 2009 AT 6:05 PM

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