Instead of trying to examine the fuel line itself, focus on symptoms indicating potential fuel-flow issues due to cold weather:
* Difficulty starting: This is a key indicator. If your car cranks but won't start, or starts slowly, low fuel flow due to cold is a suspect.
* Hesitation or sputtering: While driving, if the engine hesitates or sputters, especially when accelerating, it might be due to insufficient fuel delivery.
* Reduced power: Noticeably less power than usual points to the same problem.
What to check instead of the fuel hose directly:
1. Fuel filter: A clogged fuel filter can exacerbate issues caused by cold, thick fuel. It's easier to access and check than the fuel lines.
2. Listen for fuel pump: If the fuel pump isn't running or is weak, you'll have fuel flow problems. You might hear it whirring faintly if it's struggling.
3. Check the fuel level: Make sure your gas tank isn't nearly empty. A near-empty tank can be more prone to problems in the cold.
4. Consider the ambient temperature: Extremely low temperatures are the primary cause of fuel-related issues in winter.
If you suspect fuel-related problems due to cold weather, it's best to have a qualified mechanic diagnose the issue. Attempting to access and examine your fuel lines yourself is potentially dangerous due to the flammable nature of gasoline. A mechanic has the tools and expertise to properly assess the situation.