1999 Jeep Cherokee

1999 JEEP CHEROKEE
176,000 MILES • 6 CYL • 4WD • AUTOMATIC
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76T/A
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  • 1 POST
JEEP HAS ROUGH IDEL,ENGINE LIGHT BLINKS.(CHANGED COILPACK,PLUGS,CAM SENSOR.TPS SENSOR(THAT DID MAKE IT RUN A LITTLE BETTER)SOMETIMES IT WON'T TAKE GAS (STEP ON GAS PEDDLE BOGGS OUT LET OFF PEDAL MOTOR PICKS BACK UP.THANKS
Jan 4, 2010 at 8:33 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check and test 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
Coil and Rotor
Jan 5, 2010 at 12:59 AM
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