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What does it mean when an engine is running rich?

Discussion in 'Engine Tech / Drivetrain' started by dnunit, Dec 26, 2006.



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  1. dnunit

    dnunit Banned

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    Also, is running rich necessarily a good or bad thing? If it's good, what can I do to my engine to get it to "run rich"?

    Thanks.
     
  2. Steven.

    Steven. Formally Green 91 Registered VIP Registered OG 5+ Year Member 10+ Year Member

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  3. ryanM

    ryanM Banned

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    running rich is when your air/fuel ratio is too rich in fuel.
     
  4. BlackHopeDC5

    BlackHopeDC5 Is Black Again??? :shock: Registered VIP Registered OG 5+ Year Member 10+ Year Member

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    it means too much fuel is getting passed through and not all of it is igniting
     
  5. Genuine Rolla

    Genuine Rolla Its PETEY PETE, y0! Registered VIP Registered OG 5+ Year Member 10+ Year Member

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    too much fuel isnt good, especcially when all of it isnt being burnt.
     
  6. PhntmSk8r

    PhntmSk8r H23VTEC Registered VIP 5+ Year Member

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    on the other hand... its better to run rich than lean (especially at altitude)
     
  7. ryanM

    ryanM Banned

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    true that, leanness kills
     
  8. DAF

    DAF Zinc Member Registered VIP 5+ Year Member 10+ Year Member

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    Runing rich is acutally bad. Now, ofcourse if you are boosted, you want to run more fuel, but that is to compinsate for the boost.

    You want to run perfect, not lean, not rich. Running either will cause some performance loss, and running rich can cause pre-ingition problems as well as really shitty gas milage. Id rather run lean then rich, cause your engine will last longer lean then rich. It will also cause your sensor to go bad faster (02 and what not).

    Id get your 02 sensors checked out.
     
  9. Shiznit

    Shiznit Stickin it to the Man Registered VIP Registered OG 5+ Year Member 10+ Year Member

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    running too rich is bad, running a little rich is perfectly safe. every car in production comes from the factory a little richer than it needs to be. they all also have a catalytic converter that burns the fuel that your engine didnt ignite.

    running lean is ABSOLUTELY NOT safer than running rich. its the reason why a basemap gets tuned to lean out the air fuel mixture, and why a basemap doesnt start lean and then you richen it as you tune.

    running lean causes detonation... running rich does not
     
    Last edited: Dec 26, 2006
  10. tex-civic

    tex-civic New Member

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    i have this same problem.... im a newbie to this can yall tell me what i should do to run perfect like what parts to switch or adjust or wat not..... would really like the advice
     
  11. 00siboy

    00siboy lurkin... Registered VIP

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    ^^This. Never ever is running lean a good thing. I would rather have an o2 go bad than have pinging and detonation.
     
  12. XpL0d3r

    XpL0d3r What Civic? Staff Member Registered VIP Registered OG 5+ Year Member

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    This thread is from 2006, but as long as it stays on topic, works for me :thumbs up

    So by problem you mean that you're running rich? How do you know? Running rich isn't entirely bad, it's much better than running lean and risking detonation.. especially in boosted vehicles. Rich will just foul out your spark plugs quicker than normal wear.

    Issue possible be an issue with an o2 sensor though. Do you have a Check Engine Light (CEL) lit up?
     
    Last edited: May 1, 2012
  13. 00siboy

    00siboy lurkin... Registered VIP

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    :hitlol: doh!

    But like he said check codes.
     


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