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2003 Jeep Wrangler Misfiring during acceleration

Tiny
SVANHOU1
  • MEMBER
  • 2003 JEEP WRANGLER
  • 6 CYL
  • 4WD
  • MANUAL
  • 56,000 MILES
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.
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Saturday, May 29th, 2010 AT 10:25 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 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.
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Saturday, May 29th, 2010 AT 10:44 PM

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