2003 Jeep Wrangler Misfiring during acceleration

56,000 MILES • 6 CYL • 4WD • MANUAL
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SVANHOU1
  • MEMBER
  • 1 POST
I have a 2003 Jeep Wrangler that is bucking during accelearation starting around 2200 to 2500 RPM's through all gears. The bucking is if someone that does not know how to drive a manual transmission is driving and the rpm's will drop about 300 to 400 points, then bounce back. Acceleration is rough as well. Initially had a TPS sensor fault code and engine misfire code come up. Replaced the TPS sensor with no fix in the problem. 2nd check engine light came up with a faulty Camshaft position sensor. Replaced that sensor with no fix in the problem. I don't have any new codes but am wondering if it might be the Crankshaft position sensor. Any other thoughts as to what could be causing the misfiring and bucking? Thank you.
May 29, 2010 at 3:25 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
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.
May 29, 2010 at 3:44 PM
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