4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

need help! dont kno wats wrong

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Old 06-08-2008, 01:05 PM
  #1  
stangman08
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Default need help! dont kno wats wrong

i have a 1998 gt. i noticed it started gettin pretty poochie. finaly the check engine came on and it came up with two codes.

p1131-lack of H02511 switches-indicates lean

p1130 - lack of H02511 switches - fuel trim at limit

i thought it could be my fuel pump so i checked the pressure and it was barely 30. so i replaced the fuel pump and fuel filter and the car is still pullin the same codes. does anybody have any idea wat culd be the problem? please help
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Old 06-08-2008, 04:01 PM
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oxfordgt
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Default RE: need help! dont kno wats wrong

Your fuel pressure is supposed to be at 30 unless you remove the vacum line.

Lounds like your O2 sensors went bad.
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Old 06-08-2008, 04:39 PM
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stangman08
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Default RE: need help! dont kno wats wrong

so the first 2 02 sensors are prob bad? cuze iv replaced the back 2 not to long ago.
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Old 06-08-2008, 04:53 PM
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02 Ninja
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Default RE: need help! dont kno wats wrong

www.oxygensensors.com they have them for cheap.
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Old 06-09-2008, 03:57 PM
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grogan
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Default RE: need help! dont kno wats wrong

had the same problem. its either a manifold leak or bad 02 sensors up front.
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