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Thread: bomb going off on deceleration

  1. #1

    bomb going off on deceleration

    my motor sounds like a bomb going off when i get off the gas going into the corners i pulled the plugs and they were wet and black any suggestions where to start to fix this problem it is killing my times affraid to run it hard it sound like it is going to blow up timing is set perfect

  2. #2
    Senior Member RACING JUNKIE
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    BANG

    Sounds to Me?Like the Float Level Needs to Be ADJUSTED!
    That would be a GOOD start.............?
    Later
    G 8)

  3. #3
    Senior Member DYNO OPERATOR
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    I agree with bbchevy. Also check your fuel pressure, it could be over riding the floats.

    TS1955

  4. #4
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
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    Carbed or FI ?
    TRUTH is HATE
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  5. #5
    Senior Member DYNO OPERATOR
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    Also, your timing might have backed off.

  6. #6
    Senior Member RACING JUNKIE
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    You may just be slushing fuel try a hose between your vent tubes. Make sure to cut a notch out on the top center of the hose. Make sure your fuel pressure is under 7psi.

  7. #7
    Senior Member SENIOR BUILDER chevynovaman's Avatar
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    SOUNDS LIKE TO MUCH FUEL COMING THROUGH,, JET IT DOWN, UNBURNT OR EXCESS FUEL GETTING INTO THE EXHAUST AND IGNITING.. ALSO COULD BE IN YOUR IGNITION, MISFIRES.. OPINION.. GOOD LUCK
    1968 CAMARO 302 4 SPD IN THE ROUGH
    1957 CHEVY FUEL INJECTED LS1 4L60E BEAUTY
    1962 CHEVY II NOVA 496 LETS RACE

  8. #8
    It may be that it has loose headers, if the gasket is bad or burned out it will backfire through the exhaust too, even if you get the fuel mixture right.

  9. #9
    Senior Member RACING JUNKIE
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    Quote Originally Posted by supergass
    It may be that it has loose headers, if the gasket is bad or burned out it will backfire through the exhaust too, even if you get the fuel mixture right.
    X2 supergass, having your headers or exhaust to short also. But usually its not like a bomb going off more like m60s in your headers.

  10. #10
    Senior Member MASTER BUILDER
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    Re: bomb going off on deceleration

    Quote Originally Posted by firemanjeff
    my motor sounds like a bomb going off when i get off the gas going into the corners i pulled the plugs and they were wet and black any suggestions where to start to fix this problem it is killing my times affraid to run it hard it sound like it is going to blow up timing is set perfect

    Sounds like you have a bad ignition coil....what is your set for your distributor, coil......

  11. Racing Junk


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