MY CAR HESITATES WHEN ACCELERATES, HAS BAD GAS MILEAGE. HAS NO POWER

  • Tiny
  • Gwalkerlhs
  • 2005 Kia Optima
  • 123,000 miles


My car hesitates when accelerates, has bad gas mileage. Has no power.I have replaced rentiontly the following parts in last month. The o2 sensor just out side from engine, idle control valve, Maf sensor, and tps sensor.

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Sunday, May 13th, 2012 AT 10:29 PM

5 Replies

  • Tiny
  • fixitmr
  • Member

Have you checked timing? Any warning lights on?

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Sunday, May 13th, 2012 AT 11:09 PM
  • Tiny
  • Gwalkerlhs
  • Member

The check engine lights is on, the code that comes up is( Maf sensor) to rich, and no I haven't check timing

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Sunday, May 13th, 2012 AT 11:20 PM
  • Tiny
  • fixitmr
  • Member

Whats code #?

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Sunday, May 13th, 2012 AT 11:29 PM
  • Tiny
  • Gwalkerlhs
  • Member

#0172

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Monday, May 14th, 2012 AT 2:37 AM
  • Tiny
  • rasmataz
  • Member

P0172 rich A/F mix

Probable causes of an engine running rich are as follows:

1. Excessive fuel pressure can be cause by restricted fuel return line

2. Defective Oxygen Sensors.

3. Leaking injectors and fuel pressure regulator.

4. Coolant temperature sensor out of calibration.

5. Restricted air intake system.

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Monday, May 14th, 2012 AT 2:48 AM

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