* Fuel Tank Leak: A crack or rust hole in the fuel tank itself is a serious possibility, especially in a vehicle of that age. This is dangerous because of the fire risk.
* Fuel Line Leak: Cracked, deteriorated, or loose fuel lines anywhere along the path from the tank to the engine are common causes. These lines are often rubber and age badly. Leaks can be anywhere – near the tank, under the vehicle, or even closer to the engine.
* Fuel Injector Leak: While less common to cause a strong *interior* smell, a leaking fuel injector can spray fuel that vaporizes and makes its way into the cabin, particularly if there are cracks or openings in the firewall or floor.
* Fuel Pump Leak: Although less frequent, a leak in the fuel pump or its seals can lead to fuel escaping.
* Loose Gas Cap: While a loose gas cap won't directly cause an *interior* smell, it can allow fuel vapors to escape and build up *around* the vehicle. If those vapors manage to infiltrate through cracks or ventilation, they could contribute to the interior smell. However, a loose gas cap would usually be accompanied by other problems like the check engine light.
Crucially: A strong gas smell inside a vehicle is a serious safety hazard. Fuel is highly flammable, and a spark could ignite it. Do not drive the van until the leak is identified and repaired by a qualified mechanic. The risk of fire is too high.
Getting it checked immediately is essential for both safety and to prevent more extensive and costly damage.
