Fuel Tank - Hard to Fill Diagnosis: Overview

Group: FUEL SYSTEM

Number: 99-30-002

Date: AUGUST, 1999

Model: ALL 1999 MODELS

Subject
GENERAL DIAGNOSTIC PROCEDURES:
HARD-TO-FILL FUEL TANK

DESCRIPTION:

All 1999 and later Hyundai vehicles incorporate a new emission control system known as On-Board Refueling Vapor Recovery (ORVR). A general schematic of the system is provided below.

Some owners may experience difficulty filling their vehicle with gasoline and a premature shut off condition as a result of the gas pump nozzles installed at their gas stations. The nozzles at these stations are in the process of being retrofitted or replaced by the nozzle manufacturers. In the meantime, owners should follow instructions posted near the gas pump, and/or try filling the vehicle at a different gas station.





If the refueling difficulty continues, verify that the 1/2" vapor path from the fill vent valve on the gas tank to the air filter on the charcoal canister (see schematic) is completely free and clear. To perform the procedure below, make sure the fuel tank is below 1/4 tank full.

To quickly determine the general location of a possible vapor path restriction:

1. Disconnect the hose connected to the canister side of the liquid-vapor separator (see schematic).

2. Take the vehicle to a known "good" or major brand gas station.

A. If the vehicle readily accepts fuel, the restriction is located between the liquid vapor separator and the air filter.

B. If the vehicle does not easily accept fuel, the restriction is located between the liquid vapor separator and the fuel tank.

WARRANTY INFORMATION:

Normal warranty operation codes and times apply.