2000 Toyota 4Runner Hesitation

2000 TOYOTA 4RUNNER
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HOLLYANNSING
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  • 1 POST
Engine Performance problem
2000 Toyota 4Runner 6 cyl Four Wheel Drive Automatic 208K miles

After changing the spark plugs and wires, the vehicle now has a hesitation when taking off from a completely stopped position. Checked vacuum hoses and can't find any problems there. Used NGK plugs and wires recommended by Pep Boys. Any suggestions?
Feb 11, 2010 at 1:18 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Inspect and test all the following listed 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
Cap and rotor

Note:If it doesn't apply disregard.
Feb 11, 2010 at 8:26 PM
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