Why will fuel not flow into tank

Usually the problem is a restriction in the vent tube in the filler pipe, or the vent on top of the tank. Covering the filler tube with the new style gas nozzle guards can also cause problems.
You have to be able to allow interior pressure to equalize with outside pressure while pumping fuel into the filler tube.

Due to gas thefts becoming more prevalent when gas was either hard to come by or expensive or both, many manufacturers installed anti-siphon blocks in the gas tank filler necks of many vehicles. These can sometimes be gotten around by judicious fishing of the inlet tubing down through the gas filler neck, but it can be very hard on some vehicles. Try measuring the distance from the bottom of the gas tank to the top of the filler neck with a yardstick. You can hold the bottom of the yardstick approximately at the bottom of the tank as you can see it while kneeling down beside the back tire and note the distance to the filler tube. Mark off that distance from the end of the inlet tubing for the siphon and put a heavy mark on the tubing at that point. If you can\'t get the inlet tubing down the filler neck to this mark, you probably aren\'t going to be able to successfully siphon gas. You can try twisting the tubing as it goes down the filler neck and pushing it up and down to see if you can snake by the anti-siphon block. It helps if the siphon inlet tubing is small and stiff, but again, no guarantees.

lok at answers I sent pinched filler neck hose or kinked vent hose,or obstruction in line

the filler tube relies on an air bleed hose that runs from the top of the tank to where you place the filler nozzle. This allows air in the tank to bleed out as you are filling it. If this tube is blocked (pinched) then the air has to come out the filler tube past the nozzle and any fuel will cut the flow of at the nozzle.

the vent hose is plugged or kniked. not letting air out as fast as fuel is going in.

DTC P1455 - Substantial Leak or Blockage in Evaporative Emission Control System

The PCM monitors the complete EVAP control system for no purge flow, the presence of a large fuel vapor leak or multiple small fuel vapor leaks. The system failure occurs when no purge flow (attributed to fuel vapor blockages or restrictions), a large fuel vapor leak or multiple fuel vapor leaks are detected by the EVAP running loss monitor test with the engine running (but not at idle).

Check this possible causes:
After-market EVAP hardware (such as fuel filler cap) non-conforming to required specifications
Disconnected or cracked fuel EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube
EVAP canister purge valve stuck closed
Damaged EVAP canister
Damaged or missing fuel filler cap
Insufficient fuel filler cap installation
Loose fuel vapor hose/tube connections to EVAP system components
Blockages or restrictions in fuel vapor hoses/tubes (items also listed under disconnections or cracks)
Fuel vapor control valve tube assembly or fuel vapor vent valve assembly blocked
Canister vent (CV) solenoid stuck open
Mechanically inoperative fuel tank pressure (FTP) sensor


Check for audible vacuum noise or significant fuel odor in the engine compartment or near the EVAP canister and fuel tank

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You have a blocked fuel filler neck vent pipe, this vent allows air to exit the tank as u fill it.

If your having trouble filling the fuel tank. Consider a few things first, Have you tried holding the filler nozzle at a different angle? Have you had any resent repairs done to the fuel tank and/or filler nozzle? Are you trying to fill a fuel tank that is already full?
If none of the above suggestions apply to your problem then you may have an obstruction down inside the filler collar or the vent tube that runs parallel with the filler tube.

There is no valve. However if it has just started someone may have tried stealing gas out of your car and left something in the tank, if you pull the hose off the filler tube you can look to see if the vent hole is blocked or the flapper valve is damaged and not aloowing fuel to flow into the tank. Also look at the filler tube hose and make sure it has not been crimped.

The ORVR (On-Board Refueling Vapor Recovery) system consists of a unique fuel tank, flow management valve, fluid control valve, one-way check valve and vapor canister.

The ORVR (On-Board Refueling Vapor Recovery) system is used to remove excess fuel tank vapors. This is done while the vehicle is being refueled..

Fuel flowing into the fuel filler tube (approx. 1 inches I.D.) creates an aspiration effect drawing air into the fuel fill tube. During refueling, the fuel tank is vented to the EVAP canister to capture escaping vapors. With air flowing into the filler tube, there are no fuel vapors escaping to the atmosphere. Once the refueling vapors are captured by the EVAP canister, the vehicle's computer controlled purge system draws vapor out of the canister for the engine to burn. The vapor flow is metered by the purge solenoid so that there is no, or minimal impact on driveability or tailpipe emissions.

As fuel starts to flow through the fuel fill tube, it opens the normally closed check valve and enters the fuel tank. Vapor or air is expelled from the tank through the control valve and on to the vapor canister. Vapor is absorbed in the EVAP canister until vapor flow in the lines stops. This stoppage occurs following fuel shut-off, or by having the fuel level in the tank rise high enough to close the control valve. This control valve contains a float that rises to seal the large diameter vent path to the EVAP canister. At this point in the refueling process, fuel tank pressure increases, the check valve closes (preventing liquid fuel from spiting back at the operator), and fuel then rises up the fuel filler tube to shut off the dispensing nozzle.