Gas pump continuously shuts off when filling up tank.

ANSWER : The most common cause of this type of problem is when the fuel filler neck’s inner tube comes off of the neck itself. You will need to have the filler neck removed to check to see if the inner tube was knocked off from someone trying to get fuel out of tank with a siphon hose and managed to knock the hose off. This causes the tank to not get filled properly and the inner hose can get caught in the fuel sender causing wrong readings.

If you’d like to get this fixed, consider YourMechanic, as a certified technician can help you service your fuel filler neck and ensure that your fuel gauge functions normally. Good luck.

ANSWER : Hi there. This is very odd and to be quite honest, has us stumped. Winter fuel blends are typically less refined or oxygenated to help fuel burn in colder weather climates. However, even under the best conditions, only about 80% of the fuel that enters the combustion chamber is actually burned. It is possible that the higher levels of oxygen can create more pressure inside the fuel tank, which might cause the pump to ’click’ more often than in summer season (but this is just a theory). The only mechanical component that would cause this is a EVAP canister or purge solenoid that is faulty. I wish we could give you a direct reason why you’re having this issue, but further inspection of your Hyundai would be needed.

ANSWER : Yes, this is an issue I have experienced before myself. I had a 2007 FJ cruiser that did the same thing. The fuel filler neck is very narrow on the FJ cruiser and will cause the sense of a full tank at certain gas pumps, especially ones with sensitive nozzles. If this issue happens all of the time, then it is possible that the fuel filler neck itself has become damaged.

The neck runs down from the fuel filler area, behind the rear tire and underneath the back of the vehicle to the tank. There is also a venting tube that runs parallel to the filler neck. Rocks and debris can strike the filler neck and/or vent tube and dent the neck. If this happens, the resulting restriction of the neck or tube will cause fuel nozzles to shut off. New filler neck assemblies can be purchased and installed, but because of the nature of the repair and the safety factors involved, it should be completed by a qualified mechanic.

You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the equipment and training to inspect and/or replace the fuel filler neck assembly.

ANSWER : Hey there, thanks for writing in about your 1996 Chevrolet Blazer. If you hear the pump, but still get no fuel out of the pump, then you have the power and ground backwards in the wiring or they have it backwards on the pump. If you need help having this checked, a certified professional from YourMechanic can inspect the starting issue and let you know what repairs are necessary.

ANSWER : The vent hose on the fuel tank to the fuel filler neck is plugged up and is not allowing the air (fumes) to cycle through the system as the fuel is being poured. To verify this, the next time you fill up, hold the fuel nozzle splash guard back and put the fuel in the fuel filler neck without spilling any fuel. If the fuel is able to go in the tank just fine, then the vent hose is plugged up. If you need further assistance with your fuel entering the fuel tank issue, then seek out a professional, such as one from Your Mechanic, to help you.

ANSWER : The click noise you are hearing is the fuel backing up in the fill tube and causing the pump handle to turn off as a safety precaution to keep fuel from coming out and spilling or getting you covered in fuel. The pump handle safety was intended to prevent you from overfilling your tank. In your case you have a fuel tank that is not venting quick enough and causing your fuel back up problem. Your fuel tank has a two part tank with a crossover tube that equalizes the two parts of your tank. If the crossover tube or the fuel tank vent on top of the fuel tank is defective or damaged will cause the issue you are having. There is a recall on some newer models of the Patriot for this exact problem you are having and the dealer is replacing defective tanks. My advice is to have your tank inspected by YourMechanic for a damaged or defective fuel tank by having the crossover tube checked for proper operation and damages and the vents on top of the tanks checked for proper venting or damage during original installation.

ANSWER : Check fuel pressure. There are only three possible explanations: a fault in fuel supply (plugged filter, injectors, etc.); ignition system problems; and air induction including the idle air control valve, throttle position sensor, mass air flow sensor and vacuum leaks including the PCV and EGR systems. If obvious, and easy to check, possibilities do not reveal the fault, the recommended service to request is a rough running diagnostic and the responding certified mechanic will travel right to your location and get this diagnosed and resolved for you. It is also possible that diagnostic trouble codes have set and the mechanic will attempt to retrieve those using an appropriate scan tool. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

ANSWER : To drop the fuel tank on your model, and immediately re-install the tank (without any cleaning or service) would require about 2 to 3 hours in total for an experienced professional if a lift is available. The fuel pump itself can be installed without removing the tank but to do that you must have access to the inside of the car because the pump is removed through an access panel under the rear seat. Also, you can’t drop the tank without access to the inside of the car because to drop the tank the wiring harness has to be disconnected and that connection is only accessible from inside the car. So, if the car was locked, obviously no work was performed on the vehicle. YourMechanic does offer these services and you can start by requesting fuel pump replacement. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.