* Fuel Leaks: This is the most common cause of a gas smell. Inspect the fuel lines, connections (especially at the fuel tank, fuel filter, and fuel injectors), and the fuel pump itself for cracks, leaks, or loose fittings. A small leak can be hard to spot, so look carefully. Pay close attention to areas that experience vibration.
* Evaporative Emission System (EVAP) Leak: This system prevents fuel vapors from escaping into the atmosphere. A leak in the EVAP system can release fuel vapors, causing a gas smell. The system includes various hoses, valves, and the gas cap. A faulty gas cap is a common and easy-to-check source of EVAP leaks.
* Fuel Injectors: Leaking or faulty fuel injectors can spray fuel past the intake valve, leading to a gas smell and potentially rough running or hard starting.
* Carburetor (if equipped): While less likely in a 1995 Tracker (they generally had fuel injection), some models might have had a carburetor. Leaks or misadjustments in the carburetor could cause a fuel smell and starting problems.
* Fuel Pressure Regulator: A faulty fuel pressure regulator can cause excess fuel pressure, leading to leaks and a strong gas smell.
* Hard Starting (separate from smell): The hard starting could be related to the fuel system issues above (lack of fuel delivery, flooded engine), but could also be caused by other problems:
* Battery: A weak battery can prevent sufficient cranking power.
* Starter: A faulty starter motor might not engage properly.
* Ignition System: Problems with the ignition coil, spark plugs, wires, or distributor (if equipped) can prevent the engine from starting.
* Sensors: Various sensors (crankshaft position sensor, camshaft position sensor) can affect starting and engine operation.
The 16-Valve Engine's Relevance: The 16-valve engine in the Tracker, while generally a more powerful and refined design, doesn't inherently cause a gas smell or starting issues. However, the increased complexity might mean there are more components that *could* fail and cause these symptoms. For example, it might have more fuel injectors to potentially leak.
What to Do:
1. Safety First: A strong gas smell is dangerous. Do not start the engine or continue driving until you address the smell. Work in a well-ventilated area.
2. Visual Inspection: Carefully inspect all fuel system components for leaks.
3. Check the Gas Cap: This is the easiest and cheapest thing to check first. Ensure it's tight and not damaged.
4. Professional Diagnosis: If you can't find a visible leak, take your Tracker to a qualified mechanic. They have specialized tools and diagnostic equipment to pinpoint the source of the problem. Mention the gas smell and hard starting to them.
Don't delay addressing this. A fuel leak poses a significant fire hazard.
