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Sensors not bought from gm?

Tiny
DOINART
  • MEMBER
  • 2003 GMC SAFARI
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
Just replaced coolant sensor and 02 on 2003 safari van
still has no power, strange shifting and now excessive fuel consumption so I went to gm dealer they say its fine, its not AT ALL can u direct pleeeze
Friday, December 10th, 2010 AT 9:55 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be running rich:

1. Fuel pressure not within specs. Can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.
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Friday, December 10th, 2010 AT 10:03 AM

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