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1999 Jeep Laredo

Tiny
KATESM56
  • MEMBER
  • 1999 JEEP GRAND CHEROKEE LAREDO
1999 Jeep Laredo Automatic

first of all, the check engine light is on. When the jeep is just in park, the oil gauge is normal but when I push the gas it goes to the highest point. It is also doing a little jerk action every couple minutes under the hood when we go over 30 mph. Already replaced transmission last year.
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Tuesday, February 9th, 2010 AT 8:47 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 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.
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Tuesday, February 9th, 2010 AT 10:45 PM

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