Vehicle acting up

Tiny
VIVIDKREATIONZ32
  • MEMBER
  • 2008 KIA SORENTO
  • 6 CYL
  • 2WD
  • AUTOMATIC
I have a 2008 kia sorento lx and a couple of months ago my husband put some gas in it and it started spittng and sputterin and didnt want to go well it finally cleared up we thought it was just bad gas well yesterday he put some gas in it and it started acting up again it doesnt want to go over 45 while driving it has back fired once but when it is sitting still it is fine plus it was drving fine all day and then it started acting up again he put fresh gas in it
Wednesday, February 23rd, 2011 AT 10:38 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be caused by one of the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
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 it and keep testing.
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Wednesday, February 23rd, 2011 AT 10:41 PM
Tiny
VIVIDKREATIONZ32
  • MEMBER
  • 9 POSTS
The only time it would act up was when its driving like when it is under a load but when its idling it is ok when its reved up it is fine.
And when it is sitting it sounds fine.
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Wednesday, February 23rd, 2011 AT 11:13 PM
Tiny
VIVIDKREATIONZ32
  • MEMBER
  • 9 POSTS
On my 2008 kia sorento I had a tech come out and check it he put the machine on it and it said that it was running lean on both banks and random miss fire could you please tell me if that could be the fuel pump needing replaced
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Thursday, February 24th, 2011 AT 5:29 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You need to check the actual fuel pressure with a fuel pressure tester to rule out the filter and pump-
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Thursday, February 24th, 2011 AT 7:36 PM

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