Check the condition of the filler neck and cap

 

•  Locate the fuel filler neck. Visually inspect the fuel filler neck for external damage.
• Determine if the fuel filler neck is leaking vapor. If vapours escape from the fuel filler neck, the engine management system registers this.
• Park the vehicle on a flat, hard surface. Make sure the transmission is in park position (for automatic transmission) or 1st gear (for manual transmission).
• Put wedges around the tires. In this case, the wheel chocks will be around the front tires as the rear of the vehicle will be raised.
• Install a nine-volt battery saver in the cigarette lighter. This will keep your computer active and your settings updated in the vehicle.
• Open the vehicle hood to disconnect the battery. Remove the ground lead from the negative pole of the battery and turn off the fuel pump or sender unit.
• Raise the vehicle. Using a floor jack, lift it under the vehicle at the specified lifting points until the wheels are completely off the ground.
• Secure the tripods. The stands must go under the positions of the stands; Lower the vehicle onto the jack stands.
• Open the fuel door to access the fuel filler neck. Remove any mounting screws or bolts attached to the cutout.
• Remove the fuel tank cap lead from the fuel neck and set it aside.
• Locate the fuel tank. Check under the vehicle and locate the fuel tank cap.
• Disconnect the harness from the connector. Reach the top of the fuel tank and look for a harness attached to the tank.
• Check the rubber hose for cracks. The rubber hose must be replaced If there are cracks.
• Raise the fuel tank. Do this all the way to align the fuel filler neck with the cutout and align the fuel filler neck mounting holes.
• Align the fuel filler neck with the cutout in the fuel door area. Install mounting screws or bolts in the neck and secure them securely.
  
  
  If the Check Engine Light comes on after replacing the

If the Check Engine Light comes on after replacing the filler neck and cap, further diagnosis of the fuel system or a possible electrical problem within the fuel system may be required. If the problem persists, you should seek the help of one of the Capnecks certified mechanics who can inspect the fuel filler neck and diagnose the problem.