Car won't start and smells like gas

Symptoms

• Strong gasoline odor near the engine or under the car
• Engine cranks but won't catch, or catches and dies
• Possible visible fuel staining or dripping
• Smell noticeable even with the hood closed

Likely causes

• CommonFlooded engine from too much fuel (common on cold starts or repeated attempts)Excess unburned fuel in the cylinders creates a strong gas smell and prevents starting.
• PossibleFuel leak from a line, injector, or fuel railA genuine leak is a fire hazard and needs to be found and fixed before further use.
• PossibleStuck-open fuel injector flooding a cylinderOne injector stuck open can flood a single cylinder with fuel.
• PossibleCracked or disconnected fuel line under the hoodVibration or age can crack rubber fuel lines.
• Less commonEvaporative emissions (EVAP) system faultUsually a lighter smell and a check engine light rather than a strong raw-gas odor.

What to do

1. If you see fuel dripping, puddling, or actively leaking, do not attempt to start the car; turn it off if it's running and step away.
2. If there's no visible leak and the smell is mild, wait 5–10 minutes without cranking to let any excess fuel evaporate (a possible flood).
3. Avoid repeated cranking attempts, since this can push more raw fuel into the engine or exhaust.
4. After waiting, try starting once with your foot fully off the gas pedal.
5. If the smell is strong, persistent, or you can see fuel anywhere, call for a tow rather than continuing to try to start it.
6. Do not smoke, use lighters, or create sparks anywhere near the vehicle if you smell gasoline.
7. Have a mechanic pressure-test the fuel system and inspect lines, the fuel rail, and injectors for leaks.
8. Keep a fire extinguisher rated for fuel fires in your vehicle as a general precaution, though it's not a substitute for professional repair.

Tools and parts

When to call a pro

Any suspected fuel leak should be diagnosed and repaired by a qualified mechanic; do not drive or repeatedly attempt to start the vehicle.

Safety