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Thread: Impure Fuel in My CD70 (Engine Knocking + Engine Snatching)

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    Default Impure Fuel in My CD70 (Engine Knocking + Engine Snatching)

    In a hurry to get to my destination I bought fuel from a very shaddy lo0king Petrol pump today near Al-Karam Square Karachi. Within 20 seconds of leaving the pump I noticed my bike started knocking really really badly. My bike has never knocked so fiercely ever before. Not only was my bike's engine knocking but it was also snatching.

    Impure Fuel in My CD70 (Engine Knocking + Engine Snatching) - petrol20pump


    Engine Knocking:
    It occurs when combustion of the air/fuel mixture in the cylinder starts off correctly in response to ignition by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front. The fuel-air charge is meant to be ignited by the spark plug only, and at a precise time in the piston's stroke cycle. Knock occurs when the peak of the combustion process no longer occurs at the optimum moment for the four-stroke cycle. The shock wave creates the characteristic metallic "pinging" sound, and cylinder pressure increases dramatically.
    Effects of engine knocking range from inconsequential to completely destructive.

    Engine Snatching:
    When I accelerated my bike at low speed without changing the gear then the engine behaves jerky, which results in engine knocking but this is snatching and not knocking.

    Question:
    The engine knocking and snatching is really fierce and for the first time I think my engine is gonna die (somethings gonna break inside). Sometimes I think I should drain the tank and fill up from a decent pump........however another part of me says......."Khench ker Rakh".

    Should I drain the fuel? Or do you think the engine can take it?
    Bikes don't leak oil, they mark their territory.

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    It happens cuz your bike is literally not running on fuel its some sort of chemical mixture, I was also victim of this.. I went to mechanic and after draining the fuel (5 liters) he told me to observe the fuel. It was colourless, Was not evaporating and on getting hands wet it gives burning sensation.. Mechanic told me its chemical mixture which is cheap and used as alternate for fuel in 2 no. fueling stations.

    It literally fkuc your engine.. I drained all the 5 litres, opened the card and tunned it again. My suggestion will be to drain the fuel immediately.

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    definitely Drain the Fuel .
    once happened with my bike , When i mistakenly Pour the PSO E10.
    Till now i Fuel Up Only Trustworthy Pumps ........
    Good Decision Comes Form Experience , But Experience Comes From Bad Decision .

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    I was thinking of putting in more regular fuel to dillute the fake fuel already in it.......... hence reducing the knocking. Knocking is not alarming...... but the engine snatching is really jerky, and I think can cause damage.


    hmmm......Will drain the fuel then ----------------- Nuksaan ho gayeee
    Bikes don't leak oil, they mark their territory.

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    Quote Originally Posted by aximaxim View Post
    I was thinking of putting in more regular fuel to dillute the fake fuel already in it.......... hence reducing the knocking. Knocking is not alarming...... but the engine snatching is really jerky, and I think can cause damage.


    hmmm......Will drain the fuel then ----------------- Nuksaan ho gayeee
    Fuel kitne litre hai?

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    Drain it immediately as this cheap fuel is resulting in high amount of carbon deposit on ur valves and cylinder head!
    Its just not worth it... had experienced the same with my 2-stroke yamaha royal and it was the worst mistake I made! Had to open the cylinder haed and clean every thing + drain the petrol!

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    Quote Originally Posted by Silver_Knife View Post
    Fuel kitne litre hai?
    Sir jee fuel 2 litre liya tha and out of that I think I have consumed half of it.
    Bikes don't leak oil, they mark their territory.

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    Quote Originally Posted by Automotorsport_Lover View Post
    Drain it immediately as this cheap fuel is resulting in high amount of carbon deposit on ur valves and cylinder head!
    Its just not worth it... had experienced the same with my 2-stroke yamaha royal and it was the worst mistake I made! Had to open the cylinder haed and clean every thing + drain the petrol!
    Yes sir!
    Based on your and Silver_Knife experience I now will drain the remaining fuel
    Bikes don't leak oil, they mark their territory.

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    use the rest of the fuel to clean the chain and then lube it with fresh engine oil.. u will be happy.

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    Quote Originally Posted by aximaxim View Post
    however another part of me says......."Khench ker Rakh" [/B][/SIZE][/CENTER]
    A few litres of petrol is not worth risking the engine bro. Try avoiding such petrol pumps for a good life of your engine.

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    Quote Originally Posted by asjdsm View Post
    use the rest of the fuel to clean the chain and then lube it with fresh engine oil.. u will be happy.
    I'll use the remaining fuel for the generator. It runs on gas but starts on Petrol.
    Bikes don't leak oil, they mark their territory.

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    Quote Originally Posted by Ansee View Post
    A few litres of petrol is not worth risking the engine bro. Try avoiding such petrol pumps for a good life of your engine.
    When ur in a hurry you knowingly make bad decisions. Khair hai! I dont get it..... How is this Petrol pump surviving if it wont have repeat customers........what happened with me I wont go there in ever. How is he surviving?
    Bikes don't leak oil, they mark their territory.

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    Quote Originally Posted by aximaxim View Post
    How is he surviving?
    Not ONLY you were in hurry bro.

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    Quote Originally Posted by Ansee View Post
    Not ONLY you were in hurry bro.
    Thing is I will never go back there again. Which means as the people get aware of his practices they stop going there, therefore he will lose his customer base everyday.
    Bikes don't leak oil, they mark their territory.

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