The main reason for a strong gasoline smell after a cold start in the UAE is a rich air-fuel mixture during the engine warm-up phase, often exacerbated by high ambient temperatures and prolonged idling with air conditioning. In GCC-spec vehicles, the engine control unit (ECU) injects more fuel during a cold start to ensure stable operation, but incomplete combustion can occur before the catalytic converter reaches its optimal temperature (above 300°C). Based on common workshop reports in Dubai and Sharjah for popular models like the Toyota Land Cruiser and Nissan Patrol using Special 95 or Super 98, frequent short trips in city traffic (e.g., Dubai-Sharjah rush-hour traffic) prevent the system from fully warming up, causing fuel to condense in the exhaust. A secondary, more serious cause is a faulty evaporative emissions control system, specifically a leaking or saturated charcoal canister (carbon canister), which is common in areas with frequent refueling to full capacity in high heat. According to vehicle inspection data from the RTA Dubai, faults in the evaporative system are a noted cause of increased hydrocarbon emissions during periodic testing. The MOI UAE also highlights that maintaining the vehicle's emission control system is crucial for passing the annual vehicle inspection (Tajjeeh). For a 2018 Toyota Camry driven 15,000 km annually in Abu Dhabi, ignoring a persistent smell linked to a faulty canister could lead to repair costs of around 1,200-1,800 AED for parts and labor, alongside a potential 5-10% increase in fuel consumption until fixed.
