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1999 Jeep Cherokee acceleration

Tiny
BRANDERSON24
  • MEMBER
  • 1999 JEEP CHEROKEE
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
My car drives fine when driving in the city, but as soon as I hit the expressway and get to about 45-50 mph it suddenly stops accelerating as if it ran out of gas. It slows down and stops then shakes and turns off. I changed the oil pressure sensors and nothing comes up on the computer. Any idea what it could be?
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Friday, February 26th, 2010 AT 10:59 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hesitation, lack of acceleration, chugging, bogging etc.

Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard.
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Friday, February 26th, 2010 AT 7:45 PM

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