1999 Jeep Cherokee acceleration

1999 JEEP CHEROKEE
150,000 MILES • V8 • 4WD • AUTOMATIC
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BRANDERSON24
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  • 1 POST
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?
Feb 26, 2010 at 10:59 AM
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RASMATAZ
  • CERTIFIED EXPERT
  • 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.
Feb 26, 2010 at 7:45 PM