Fuel Smell on Cold Start – Ford Mustang 2020
A gasoline odor during cold start in a 2020 Ford Mustang often indicates a fuel system leak or incomplete combustion. Common causes include a leaking fuel injector, purge valve stuck open, or a loose gas cap. This can pose a fire hazard and should be addressed promptly.
Diagnosis Details
Possible Causes
Leaking fuel injector (dripping fuel into intake during cold start)
Evaporative emissions (EVAP) purge valve stuck open, allowing fuel vapors to enter the intake
Loose or damaged gas cap causing vapor leak
Fuel line or connection leak (less common on newer vehicles)
Related OBD-II Codes
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What You Should Do
Check gas cap first – ensure it is tight and not cracked.
If smell persists, inspect for visible fuel leaks around injectors and fuel rails.
Have a mechanic perform a smoke test on the EVAP system and check fuel injector operation with a scan tool.
Do not drive if smell is strong or accompanied by visible fuel puddles.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
