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Thread: Engine Knock in Toyota premio

  1. #1
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    Default Engine Knock in Toyota premio

    AOA. I have a Toyota Premio 2005. The car is running on dual fuel (Gasoline as well as CNG). While converting the vehicle to petrol, the engine starts knocking too much. I tried manual clean up of the whole intake system as well as used injector cleaner so that in case there is any carbon or scaling inside injectors, that can be cleaned. I have also replaced spark plugs. As per my knowledge the efi and vtec engines dont knock. Also as the engine gets older, its conpression ratio decreases which prevents it from knocking. The other thing people suggest is the use of hi octane, but that is not a solution. There must be some mechanical problem behind it.

    I would appreciate if anyone can help me to figure out the cause of pinging or pre-ignition.

    Thank you

  2. #2
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    Default

    There is no mechanical problem, the fuel rated in PK is not suitable for JDM cars, tahts why some of them knock. The ones fitted with a knock sensor do not knowck but engine cannot be that efficient or perform the way it should.
    Keep a cool head and wear seatbelts!

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    Default

    Whats the mileage of ur car?
    try hi octane petrol
    it is usually due to bad valve clearance

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    Default

    I havent checked mileage. I guess it would be more than 10 in city. Pre-ignition is because of advanced ignition timing or bad air fuel mixing (correct me if i am wrong). I need to check tappet. thank you

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    Default

    dear change ur petrol pump, the petrol u using might be mixtures of some irani oil or else.
    and
    whats milage on ODO meter?
    The time you enjoy wasting is not wasted time.

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    Thank u. Mileage is around 90000km

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    Default

    Quote Originally Posted by spectra View Post
    There is no mechanical problem, the fuel rated in PK is not suitable for JDM cars, tahts why some of them knock. The ones fitted with a knock sensor do not knowck but engine cannot be that efficient or perform the way it should.
    agreed
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    Default

    check ur AIRFLOW sensor,,,if it has any check light!!

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    Default

    Use only CALTEX oil.
    Also add LM Ceratec to your engine at the time of oil change.

    This removed knocking from 2 JDM cars(Axio Fielder & Nissan AD) I know off.

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    Default

    Thank you all. "murtazee" I have changed my fueling station, it worked. The knocking has reduced. "Haziqshah" yeah there is an engine check light whcih turns on ramdomly. I have checked all sensors and all of them with carb cleaner but still the indication didnt vanish. "Baleno 1300" what is LM ceratec???????????? what is it used for???????? is it octane booster?

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