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miss and rich gas

Discussion in 'General Chevy & GM Tech Questions' started by bowtie boy, Sep 15, 2012.

  1. bowtie boy

    bowtie boy New Member

    I've replacedall thus common things. The map sensor has not yet been done and the fuel pump but everything else. Help bowtie lovers
  2. Chris Miller

    Chris Miller Rockstar 100 Posts

    What's the year and model?
  3. bowtie boy

    bowtie boy New Member

    1995 Chevy 305 pu
  4. Skippy

    Skippy Member 2 Years 100 Posts

    Are you getting an actual "Rich" reading code, or is this diagnosed another way?
  5. moogvo

    moogvo Epic Member 5+ Years 1000 Posts

    Map and o2 sensors are responsible for fuel mixture on these trux. Check vacuum lines. Are you getting a check engine light?
  6. dipstick

    dipstick Member 2 Years 100 Posts

    Check fuel pressure 9 to 14 psi..also might be the coolant temp sensor.
  7. moogvo

    moogvo Epic Member 5+ Years 1000 Posts

    Pit would be more helpful if you could tell us more... What are the circumstances that make it happen? Engine hot, cold, all the time? Under load, under acceleration, etc. the more info you can provide, the more we can give good advice.

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