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Thread: Missing and White smoke

  1. #1
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    Default Missing and White smoke

    I did a complete overhaul (cuore model 2008 189000 driven) with genuine engine parts
    Bought from Toyota Walton
    But assembled in my trusted mechanic

    After completing running of 4000 kms
    Mechanic tunned its tapet and timing etc
    Car worked very strong and very efficient fuel millage
    But after 6000kms i felt some times LITTLE missing and some Time STRONG missing between 20-60 speed (at fixed pedle car takes jerks not go smother) if you press pedel then stops jerking

    a second issue is

    The car in cold startup did strong thrilling and gives BLACK-white mix smoke for 2 to 3 minutes then automatically thrilling stops and smoke vanishes
    All day car go strong . Above mentioned issue only happens in morning


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    as you said that the problems started after the mechanic tuned and adjusted the timing, it means that the missing is probably due to faulty ignition timing.... does your car run on cng/petrol both or just petrol??? the ignition timing is a crucial part of the engine... and then maybe this is further accompanied by wrong tappet settings/valve clearances....so get the timing readjusted and the settings.... secondly, the grey smoke that you notice in the morning is most probably a worn out valve seat.... if you bought the parts yourself and ensured that the part was installed in the engine then it is not a "worn out" valve seal but a poorly fitted one... what happens is that when you park your car at night, oil slowly starts dripping into the cylinder.... when you start your car in the morning, that oil burns with black and white/grey smoke..... strong thrilling in cold start ups is a faulty idle air control valve....

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    A very less dense white fumes can be unburnt petrol too your cars is could be running too rich

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    If radiator coolant is not decreasing then white smoke is normal and the result of combustion. Black smoke indicates engine is running rich.

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    Default

    Car is on petrol always
    I'll check all settings and tapets.
    I purchased all parts by my self and fitted under observation.

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    I also serviced carburetor because it was too much dirty
    Carburetor man told he readjusted butterfly


    My friend told me that "your carburetor has gone it's valves and jets lose their sizes with passage of time so try to buy kabli "
    Is that statement true?
    Is that missing due to faulty carburetor?

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    Quote Originally Posted by awaisamjad1 View Post
    I also serviced carburetor because it was too much dirty
    Carburetor man told he readjusted butterfly
    My friend told me that "your carburetor has gone it's valves and jets lose their sizes with passage of time so try to buy kabli "
    Is that statement true?
    Is that missing due to faulty carburetor?
    Bad carburetor will cause black smoke and also missing. Try to get it fixed first. If it is not fixable then you may go for kabli.

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    What does it mean "engine going rich"

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    Quote Originally Posted by awaisamjad1 View Post
    What does it mean "engine going rich"
    More fuel compared to air a gasoline engine run 14:1 ratio of air fuel

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    Default

    Today I checked tapet and timing that are Ok
    Now waiting for carburetor man to open his shop (Jumma prayer)

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    Quote Originally Posted by awaisamjad1 View Post
    Today I checked tapet and timing that are Ok
    Now waiting for carburetor man to open his shop (Jumma prayer)
    I think the problem is with ignition system and not with carb

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    Default

    Check ure engine oil level too , overfill of engine oil can cause vibrating and missing when oil goes to plugs

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    Today I checked carburetor by carb man
    He opened it in front of me
    Carburetor was fine from inside
    He told that he has readjusted the Mixture at its standard
    Now the issue is not in carb
    Current coil may not response properly which may cause missing and vibration
    He claimed that after this settings it will not give black smoke
    Now lets see

  14. #14
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    Quote Originally Posted by awaisamjad1 View Post
    Today I checked carburetor by carb man
    He opened it in front of me
    Carburetor was fine from inside
    He told that he has readjusted the Mixture at its standard
    Now the issue is not in carb
    Current coil may not response properly which may cause missing and vibration
    He claimed that after this settings it will not give black smoke
    Now lets see
    Bro the issue resolved?

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    It was just resolved 70% for 2 days only
    But on the third day black smoke again appeared and engine doesn't start idle while cold .you have to accerlate a little
    But when thrilling stops u can leave pedle car runs idle.
    I m much disappointed and confused.
    Engine starts in cold with little accerlator give black smoke and starts missing .
    car vibrates for 40-50 secs (engine strongly shakes)
    Then get relax can run idle

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    Seems not much of problem, I think there is high moisture/ water is in fuel so first check it out. The shaking is due to contaminated fuel so have look at your fuel filter and see if it has some signs.

    1. Your timing as you told is OK.
    2. Your carb may gone BAD which already have serviced. ( stop worrying about butterfly etc. I dont think so coure has a vacuum or efi )

    So we left with this one issue WATER which is somehow in your fuel system so check it out why it is getting in the fuel system NOT in ENGINE Block as your head gaskit is OK.

    If there is a Grey smoke it means the water is mixing up with fuel + Oil is burning too which in your case not seems the issue but do check oil levels regularly.

    SO IN MY HUMBLE OPINION YOU CHECK THE WATER AND FUEL AND SEE WHERE THEY ARE GETTING MIXed Up.

    Regards.

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    Unhappy Cuore Black Smoke in Morning and at full accerlator

    dear fellows :
    car missing was solved by adjusting and cleaning race and slow jet valve
    timing is OK
    No Water is reducing
    No engine Oil is reducing
    current system is OK and distributor is also Electronic.


    The issue i face :
    1) In morning or any time of day when car parked for 6 to 8 hours Auto Choke doesn't work i have to give accelerator for 1 or 2 min in this duration CAR THRILLS INTENSIVELY AND GIVE BLACK SMOKE on every exhaust stoke
    then car runs smooth and drops water and steam as well.Black Smoke vanishes.

    2) At full accelerator car gives black smoke?

    I add one thing when auto choke worked car also used to thrill and gave black smoke. During its run no black smoke appears

    Now at Mechanic End :
    He said at the time of adjustment some carburetors lose its auto choking system with passage of time i can't do any thing for it BUT i have corrected you missing issue( cleaned inner jets).
    Go for Kabli carb.


    what should i do
    while some body above told that valve seats are weak so that is gives black smoke .
    please explain?

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    Dear All,

    I got Mira 2008 model last year, It is working OK but I noticed few issues.

    when I start Mria it spray something like carbon and later it get dry.

    secondly I noticed it is decreasing engine oil approximately half litter 10/14 type engine oil.

    last time i tired 5/30 engine oil and went to ISB and come back to LHR. one litter engine oil was gone and also I noticed during incline car was losing engine power.

    there is no black or Wight smoke coming from car.

    any comments on about issue.

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