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Question DetailsAsked on 6/8/2017

MY CAR SOUNDS LOUD WHEN I DRIVE. ACCELERATING?

2007 KIA SEDONA, WITH 139000 MILES ON IT. I JUST HAD THE FLEX PIPES FIXED AND IT STILL SOUNDS LOUD.

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You did not say exactly what it sounds like, though the inference is exhaust. Well - normally a leaking exhaust system (burn or rust-through, leaking or cracked connection, even plugged catalytic converter) would be the cause - though a cracked exhaust manifold and blown exhaust manifold gasket or exhaust to manifold fitup seal ring (both of which commonly go out around 100,000-150,000 mile range give or take) also commonly cause this - as well as of course rarer issues like a loose spark plug allowing leakage, leaking valves allowing blowby into the rocker cover - and those are just exhaust noises.


There are a variety of mechanical drive train things which can cause acceleration noise too - from an engine miss under load, engine noise from some worn part, bearings (engine, suspension, or drive line), transmission or differential gear clash or bearing issues or low fluids, wheel suspension components or bearings worn, loose wheel, etc.


Sounds like you need to find a good mechanic (Auto Repair is the Search the List category to find a well-rated and reviewed shop) who has full diagnostic and repair capability to trace down the source - by listening to the car when running, by standing by and having the car driven by while he is listening from outside, by using thermal infrared camera to look for leaking exhaust gases, using a stethoscope to listen for unusual engine or transmission sounds, by checking for loose components or excessive slack, etc.

Answered 1 year ago by LCD




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