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2015 V8 ultimate - random miss fire, no codes

Cudhoo

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Jul 24, 2024
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Genesis Model Type
2G Genesis Sedan (2015-2016)
Im new here. 2015 V8 ultimate AWD. 250,000km.100% dealer serviced since new. It feels like shudders and miss fire like its bad gas randomly. Somtimes shuts off at traffic lights. Dealer has replaced all injectors, spark plugs, all the fuel pumps ($9k out of my pocket) any thoughts? If you hammer the throttle she goes, and seems to smarten up for a bit. Feels like a fuel control or fuel pressure issue. After it stalls it seems to turn over 3-4 times as long to start up as is there is no fuel. (someone suggested a OCV - oil control valve)
 
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