how to bypass the o2 sensor
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Thread: how to bypass the o2 sensor

  1. #1
    NECO Member quickkat's Avatar
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    how to bypass the o2 sensor

    is there a way to bypass the o2 sensor on my 1999 mercury cougar?? a guy at autozone said sumting about putting a washer on the intake but id rather have you opinion

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  3. #2
    NECO Member hubbard2_a's Avatar
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    Re: how to bypass the o2 sensor

    hmm, ther is the MIL eliminator mod. but that goes on the o2 sensors on your exhaust.It tricks the car into thinking you still have your pre cats when they have been gutted or removed
    01 mtx, Borla daul exit, weapon R short ram, mass air mod, pre cat mod , heavey duty clutch, loose screw holding the steering wheel
    kinda went on the back burner when I got the 929 though. cbrworld.net

  4. #3
    NECO Member Gold Member Tygerr's Avatar
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    Re: how to bypass the o2 sensor

    MIL eliminator or a tune to get rid of it.
    Buckeye @ heart
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  5. #4
    NECO Member BlackBetty's Avatar
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    Re: how to bypass the o2 sensor

    Putting a washer on the intake?

    Yeha go for a MIL eliminator, you could probably pick one up @ your local exhaust shop.

    Sold-1999 3.0L Mercury Cougar- Cougardb // Cardomain // Fuelly
    New- 2011 Ford Fusion Sport AWD- CAI&tune. Fuelly//Cardomain

  6. #5
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    Re: how to bypass the o2 sensor

    so its true if i gut all the catalyst material out of my 99 cougar v6 i will have the check engine light on always?

  7. #6
    I love lamp Lifetime Platinum MemberModerator ice992's Avatar
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    Re: how to bypass the o2 sensor

    Quote Originally Posted by tuka View Post
    so its true if i gut all the catalyst material out of my 99 cougar v6 i will have the check engine light on always?
    not if you also install mil elims which trick the computer into thinking its getting the correct readings

    see the how to section.. search mil eliminators

    you can make then for like $3.50 if you can solder if not you can get them on ebay for like $15 shipped i believe
    -Dan

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  8. #7
    3L Install Maestro Moderator Blackcoog's Avatar
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    Re: how to bypass the o2 sensor

    I believe the washer he was talking about is actually a spacer you put to pull the 02 sensor out of the exhaust pipe a bit. It isn't for your intake. I've heard that for some cars this is enough for the sensors to register normally.
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  9. #8
    NECO Member michcougar's Avatar
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    Re: how to bypass the o2 sensor

    I was under the impresion that the o2 sensor had to be working properly when hooking it up to an MIL elim.
    MICH,
    99 Laser Red 3L Roush Cougar & 08 Ford Edge SEL

  10. #9
    Faster than Dan. Lifetime Platinum MemberModerator B3NN3TT's Avatar
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    Re: how to bypass the o2 sensor

    The ECU uses the O2 sensor's data to control your air/fuel ratio.

    You need those.

    WTF do you want to bypass it for?

  11. #10
    NECO Member quickkat's Avatar
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    Re: how to bypass the o2 sensor

    ok thanks the 02 sensors are on the precats not on the original cat which is gutted out on mine but if i put washers between the 02 sensors it mite work??

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