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I believe my car is running very rich when I accelerate it hesitates, and I hear what sounds like a machine gun going off in my exhaust pipe. I can't figure out what the problem is, I already changed the spark plugs. I've been told That it could have been Is the MAP sensor, distributor, distributor, coils, or a general, or I just need a tune. I will try to upload a little video it happens anytime I accelerate past 2000 RP m's
 

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2010 3.8 genesis coupe
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I believe my car is running very rich when I accelerate it hesitates, and I hear what sounds like a machine gun going off in my exhaust pipe. I can't figure out what the problem is, I already changed the spark plugs. I've been told That it could have been Is the MAP sensor, distributor, distributor, coils, or a general, or I just need a tune. I will try to upload a little video it happens anytime I accelerate past 2000 RP m's
Not sure if you’re having a similar issue to me as my car was running lean instead of rich, I also have a 3.8 don’t know if you’re running a 3.8 or a 2.0, but in my 3yrs of owning my genesis I’ve learned that the pressure regulators in the fuel pumps are absolutely terrible. I’ve replaced the fuel pump assembly in mine 3 times now. Finally switched to an AEM fuel pump when it went the third time, thinking it was the fuel pump, and I was still running lean. Ordered a whole fuel pump assembly and just replaced the OEM fuel pump with the AEM one and it ran fine again leading me to think the pressure regulators are just **** in them and can’t keep up with the aggressive burble tunes and dumping all the extra fuel. So not sure if this is true or if u have just had incredibly bad luck with them and also not sure if this is your issue but just food for thought on a possible issue
 

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I remember having a popping noise in the exhaust of the 73 Laguna I bought used many years ago. My dad told me that could be caused by small holes in the exhaust system/pipes. Unburned fumes in the exhaust could get enough oxygen to pop/burn in the exhaust. I bought new pipes/mufflers, dropped my old exhaust out from under the car and sure enough, there were the little holes along the seam in the pipe where they'd rusted through.

Not sure a fuel injected/computer monitored system like we have in the Coupes could run rich enough to have issues with ignition back through the exhaust but funny things can happen sometimes.
 
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