BUCKING OR CHUGING

  • Tiny
  • Stevis
  • 2005 Kia Sedona
  • 6 CYL
  • FWD
  • automatic
  • 133,000 miles

2005 Kia sadona van code 302. Missfire set once has not reset. Also code po 171. Lean condishtion. It has reset. When driveing the car it will for a short time start bucking or chuging and some times die if at lower rpm. But all other times runs good. Could this be fuel or elect.
Thanks Steve

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Tuesday, January 11th, 2011 AT 6:07 PM

5 Replies

  • Tiny
  • rasmataz
  • Member

Could be caused by one of the following below:

1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen Sensor.

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Tuesday, January 11th, 2011 AT 6:19 PM
  • Tiny
  • Stevis
  • Member

Could this be fuel filter or pump it seems to be happening more often all the time

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Tuesday, January 11th, 2011 AT 6:42 PM
  • Tiny
  • rasmataz
  • Member

Check the fuel pressure with a gauge -to rule out both

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Tuesday, January 11th, 2011 AT 6:50 PM
  • Tiny
  • bmwtechwaqas
  • Member

Def check the fuel pressure, also keep in mind just because you have good fuel pressure doesnt mean anything. Always check if you have a good fuel FLOW too. Alot of time techs miss that flow concept. I am not sure what excatly the specs are as far as flow goes. I'll look for it and let you know.

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Tuesday, January 11th, 2011 AT 7:18 PM
  • Tiny
  • Stevis
  • Member

HERE IS SOMETHING I FORGOT THE OWNER TOLD ME THAT THE BRAKES WERE HARD. WELL WHEN I WENT TO MOVE IT TODAY SHE WAS RIGHT FOR ABOUT 5 MIN. OR ABOUT 3 OR 4 MILES THEY WERE HARD KIKE NO POWER BRAKES THEN JUST LIKE THAT THEY STARTED WORKING COULD THIS BE RELATED TO THE ENGINE PERFORMANCE QUESTION.
STEVE.

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Wednesday, January 12th, 2011 AT 7:04 PM

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