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Horrible Fuel Economy - O2 Sensor?

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    #1

    Horrible Fuel Economy - O2 Sensor?

    Hey again guys,

    You guys may remember me from a few weeks ago, I had a problem with my ignition coil. Since then, I have been getting horrible gas mileage - about 10 MPG. Before I replaced my ignition coil I was also getting bad gas mileage, about 17-20 MPG, but nowhere near as bad as it is now.

    I also replaced my spark plugs (NGK) but didn't check the gapping on them before installing. I don't think that could make that much of a difference in fuel economy.

    I've been reading that O2 sensors are frequently the cause of horrible gas mileage, and I'm sure that's what the majority of you will say, but I just need to make sure before I go and drop the money for it.

    Thanks!
    Tags: None
    #2
    A bad o2 sensor will definitely cause poor fuel economy. Is your check engine light on?






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      #3
      I remember when I have an exhaust leak with 1 or 2 slightly bent wheel I got poor ass gas mileage too. You should have those check too.
      Checkout my MR: http://www.cb7tuner.com/vbb/showthread.php?t=165984

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        #4
        Well, the car has a bad cylinder so the CEL is always on because I have the injector for that cylinder unplugged. When I plug the injector back in, I get a CEL after about 20 minutes of driving it, and sometimes it never even comes on.

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          #5
          ^ so you say you unplug one of the injector plug and daily drive it like that?
          Checkout my MR: http://www.cb7tuner.com/vbb/showthread.php?t=165984

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            #6
            Yeah, I've been driving it like that for over a year now. Driven it multiple times on trips down to Cali from Seattle and it's been perfectly fine.

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              #7
              You have to get that code man.
              www.PreludePower.com
              BB SQUAD MEMBER #28 V.2

              Comment

                #8
                Fix or replace your engine. We can't help you if you're running a 3 cylinder engine.






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