Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Tank & Filler Cap
The fuel tank is an integral part of the Evaporation Control System. In order to collect as much vapor as possible, the fuel level was reduced by lowering the filler neck from the highest point of the tank by approximately one inch. This allows room for expansion and vapor collection on top of the liquid. Fuel venting occurs at three positions on the tank. These vents allow fuel and fuel vapors to flow from the top of the tank to the liquid-vapor separator. In order to prevent a vacuum collapse or pressure expansion, the fuel tank cap has been modified to release excess pressure or allow additional air to enter during stages of high vacuum. The cap also has dual locking action. The second set of ears on the cap provides a slow bleed of any residual fuel tank pressure when the cap is removed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.