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Thread: Passo 2010 and after effects of catalytic converter removal.

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    Exclamation Passo 2010 and after effects of catalytic converter removal.

    Hi Guys,

    I have Passo 2010 model. Its fuel consumption suddenly dropped from 16.7 km/L to 11 km/L. And pick also became fade. Upon suggestion of my auto mechanic, i have removed catalytic converter. But after its removal, i have been facing following issues...

    1. Engine check light is ON. Scanner is showing error fault on O2 sensor...but It doesnt flush upon deleting errors. Upon removing battery terminals, it wiped off for a certain time but then, again, it re-appears...

    2. Car pick is dropped badly...

    3. Car sound becomes too loud...

    Can you please suggest any way forward?You key input is required here...

    Regards,
    Umer

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    You Removed The Catalyic Converter of A 4 yr old Jdm, You did very wrong. How much mileage is on the odo??
    Laws r Made to be Broken

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    Yes, Catalyic Converter was blocked and mileage was around 16.7 km/L even on motorway ...
    And within city, it was less than 15 Km/L.

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    get a new one, u get it from near old city saddar rwp...
    people who use Highbeams.. once day would suffer too bigtime. People who drive slow on fast lanes, remember one day a vehicle carryin ur son, dad might get late to hospital coz people like u. underaged driving will land u in bigtime trouble one day or the other.. And the Blue indication light on ur speedometer denotes "High Beams"

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    First, change your mechanic. 2nd, prepare yourself for a big hole in your pocket & get a replacement CAT installed.
    ChipLoco.com | Anything and everything from the tech world!

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    Will it be the only reason for engine check light and low petrol mileage?
    Any idea about the cost of Catalyic Converter??

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    Now as you have made a mistake do the following things:

    1.For the loud sound install a dholki in the place of the catalylic converter this will reduce the sound to 90% wont cost more than Rs 700/-
    2.Get the O2 sensor checked instead of trying to erase the error code.
    Hopefully this will get the car perfectly fine and improve the fuel consumption. Catalyic Converter should only be removed if the car is very old and has done atleast 150+km on the odo.
    Laws r Made to be Broken

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    And the first thing you should do is change your mechanic
    Laws r Made to be Broken

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    o2 gone bad.
    Bella, You give me everything just by REVing - NEONLIGHT SAGA: NEWTUBE

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    Its giving CEL because you removed CAT and the post O2 sensor is there to check if CAT is working correctly or not. So no CAT == Post O2 gives variable readings == CEL. @Xulfiqar can explain clearly.

    Quote Originally Posted by umeryounis View Post
    Will it be the only reason for engine check light and low petrol mileage?
    Any idea about the cost of Catalyic Converter??
    Quote Originally Posted by muradi View Post
    Now as you have made a mistake do the following things:

    1.For the loud sound install a dholki in the place of the catalylic converter this will reduce the sound to 90% wont cost more than Rs 700/-
    2.Get the O2 sensor checked instead of trying to erase the error code.
    Hopefully this will get the car perfectly fine and improve the fuel consumption. Catalyic Converter should only be removed if the car is very old and has done atleast 150+km on the odo.
    Quote Originally Posted by usman_arooq2 View Post
    o2 gone bad.
    ChipLoco.com | Anything and everything from the tech world!

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    1. Both O2 sensors are showing readings when checked thru meter...Any known healthy range of values which will show the health of sensors?
    2. If I install dholki in the place of the catalylic converter...Will it have any impact on fuel consumption as well?
    3. Even Toyota motors suggested to remove catalytic converter :-( and then, i finally removed that...
    4. Any estimate of O2 sensors cost?

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    Dholki will only reduce the loud sound, and if it was really blocked which i dont think so then it is alright.
    Laws r Made to be Broken

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    Thanks a lot for your valuable suggestions.
    So it appears to me, that post O2 sensor is correct but its showing fault sign because of removal of CAT. So in this case, how i can remove engine check light? Removing errors is not serving the problem and sensor is also sensing and passing readings....
    And now, if i add dholki ....i guess, it will add to the problem as well....

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    Quote Originally Posted by umeryounis View Post
    Thanks a lot for your valuable suggestions.
    So it appears to me, that post O2 sensor is correct but its showing fault sign because of removal of CAT. So in this case, how i can remove engine check light? Removing errors is not serving the problem and sensor is also sensing and passing readings....
    And now, if i add dholki ....i guess, it will add to the problem as well....
    Adding Dholki will not add to the problem.
    Tried and Tested!!
    Laws r Made to be Broken

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    No o2 is not nuts. There are two oxygen sensors in your car.one upstream used for maintain air to fuel ratio. Second one is down stream used for observing cat function. When you removed cat out sees no change in various gases that were to be done by cat. Solution either buy new cat or get it's emulator made. @Xulfiqar may know some one or how to do.

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    as afnan said - you are stuck with a dead wall situation. The secondary O2 sensor's only function in life is to measure the performance of the cat. It works on a very small voltage change that is usually between 0.51 and 0.61V.

    If your car has a front O2 sensor - its amplitude wave is from 0.1 all the way to 0.9V -as soon as the rear sensor starts seeing this - the ECU knows that the cat is bad.

    Remedy - choose one -

    install a cat
    build emulator for rear sensor
    mask the rear o2 sensor with a shroud - like a spark plug adapter on the o2 sensor and hope it works.

    The best performance will come out of replaceing the cat, the rest will still cause the noise and silly running.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    Perfoming an Itallian tune-up once a week should keep the CAT clear and keep your ride running well . I do that on my Civic ever since the CAT was cleaned 6 months ago. So far so good.

    Read:

    Italian tuneup - Wikipedia, the free encyclopedia

    and

    How to perform an 'Italian tune-up?' | Motoring discussion | Back Room Forum | Honest John

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    the cat converter operating temperature is quite high and today's EFI cars are so finely tuned that the cat is usually ignited as soon as the engine is warmed up.

    Most failures of this item in Pakistan are not actual failures but simple guesses that the honeycomb looks like a blockage. The rest actual failures would be that the mechanic is using plumbing grade RTV on the engine which can poison the cat and O2 sensors. Or running the engine on misfire which actually can overheat the cat to the point of melting.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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