BAUGHT INJECTORS AT JUNK YARD STILL BLOWING ...

  • Tiny
  • mikecon24
  • 2000 Chevrolet Cavalier
  • 144 miles

Baught injectors at junk yard still blowing black smoke and runs rough idleing

Monday, January 14th, 2013 AT 5:03 AM

4 Answers

  • Tiny
  • caradiodoc
  • Expert
  • 25,273 posts

What led you to the injectors? You know they didn't all fail at once. GM has a lot of injector problems but they almost always flow too little fuel. Black smoke is a sign of burning too much fuel. Usually that is because the Engine Computer is commanding too much fuel based on incorrect sensor readings. A sensor can partially fail and not set a diagnostic fault code, but most of the time a code will be set and the Check Engine light will turn on. Did you check for fault codes? If you did, what were they?

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Monday, January 14th, 2013 AT 6:03 AM
  • Tiny
  • mikecon24
  • Member

Its reading code po191 I changed upper oxy sensor then did the injectors because it did not work

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Tuesday, January 15th, 2013 AT 1:14 AM
  • Tiny
  • caradiodoc
  • Expert
  • 25,273 posts

P0191 Fuel Rail Pressure Sensor Circuit Range/Performance

Is this the description you came up with? I've never run into this code before.

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Tuesday, January 15th, 2013 AT 3:23 AM
  • Tiny
  • mikecon24
  • Member

Maybe it was po171 I have to check again to make sure.

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Tuesday, January 15th, 2013 AT 9:56 PM

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