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Anonymous
Anonymous asked in Cars & TransportationCar Audio · 10 years ago

car shakes and loud popping sound?

why when i try to accelerate fast does my car shake and make a loud popping sound? My car does not accelerate to full potential. I cleaned replaced air sensor, fuel filter, and just changed out the spark plugs. I changed the spark plugs thinking it was a misfire, and a few looked pretty ugly, so i thought when i started the engine it would run like a beast! but it didn't :( . ... before i changed the spark plugs it would still make that loud poppining sound when i accelerated fast, and now the i changed the spark plugs IT'S EVEN LOUDER!!!! this is on a 1994 mercury cougar v8 4.6L 66,000 miles

5 Answers

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  • ?
    Lv 6
    10 years ago
    Favorite Answer

    Sounds like the timing is incorrect.

  • 10 years ago

    Timing should be 10 degrees beyond TDC. Popping sound on acceleration could be caused by a leak in the exhaust system. With hard acceleration cold air is sucked into the hot exhaust,through the leak opening, giving oxygen to any unburned gas vapors in the exhaust causing ignition and loud pops. If there is allot of gas available in the exhaust then it would cause back pressure and pore performance.

    This could be caused by a plugged catalytic converter causing back pressure.

    Need to have the intake checked for leaking.

  • Anonymous
    4 years ago

    Ditto with mustang guy, I have not heard that there is a filter out interior the line regardless of the straightforward incontrovertible actuality that. Mine began to get noisy and modify into leaking fairly. i complete up setting up new fluid in a pair of situations even as it ultimately ran low I further the skill preparation conditioner and this very a lot helped both the noise and the leak.

  • 10 years ago

    its either the timing or the distributor cap or the or distributor itself.go to sears auto repair they will look at it and find the problem for free and you just say your going to have to save some money.that's if its something big.good luck

    Source(s): installer
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  • 10 years ago

    change your timing belt.

    in my opinion, that cars junk. thats probably why its doin that lol.

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