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2015 kia optima gdi wont start good battery spark plugs coils fuel injectors both fuel pumps are all good fuses good wiring good but won't start had a flashing cel when last drove for like 15 seconds if that **** it off towed it home have no clue whats wrong.
 

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2013 Ebony SXL Turbo: Original Everything @ about 189K with Drag wheels.
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Flashing CEL is not good at all. The flashing is the system telling you to let off the throttle immediately. Most likely because far too much unburnt fuel is making it thru exhaust to cats, which don't do well medium to long term with that condition.

If you have an ODB2 reader, scan for the CEL code, the answer lies there as to why it will not start. Luck.
 
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