Thread: Loud noise

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  1. #1 Loud noise 
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    I recently replaced my catalyst converter and to pass emissions and after That my car started being loud mainly when the car is cold or when I’m accelerating but when the car warms up it becomes quiet but when I mash up the gas I start hearing again but not as loud when the car is cold. I passed the emissions and everything and till this day my check engine like is still off I’m just tired of the noise.
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  2. #2 Re: Loud noise 
    Killa Bee Scottydoggs's Avatar
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    no one can help ya with out a vid of this noise.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: Loud noise 
    GrandPrix Junkie
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    That would likely be an exhaust leak. Check the connections at the rear manifold and the end of the downpipe.
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