The exiting smoke deposits a residual fluid that is either bright green or bright yellow in color when viewed with a UV light. If a leak is concealed from view (i.e., top of fuel tank), release the remote smoke/air start button, and use the ultra- violet (UV) black light #8404-UVL and the yellow goggles 8404-20 to look for residual traces of dye that is left behind by the smoke. While still holding the remote smoke/air start button, use the white light (#8404-CLL) to follow the EVAP system path, and look for the source of the leak indicated by exiting smoke. NOTE: For optimal performance, introduce smoke into the system for an additional 60 seconds continue introducing smoke at 15 second intervals, as necessary. NOTE: Make sure that smoke has filled the EVAP system by continuing to press the remote smoke/air start button, remove the vehicle fuel cap, and wait for the smoke to exit. Once smoke is indicated reinstall the fuel cap. NOTE: The flow meter indicator ball will not move in the smoke mode. Set the smoke/air control switch to SMOKE. Remove the Air supply hose from the service port (if equipped) or from the #8404-ADP adapter.Ĭonnect the SMOKE supply tip (black hose) to the service port (if equipped) or to the #8404-ADP adapter. To continue testing, you will need Miller Tool #8404A Evaporative Emissions Leak Detector (EELD). NOTE: A thorough visual inspection of the Evap system hoses, tubes, and connections may save time in your diagnosis. Look for any physical damage or signs of wetness at connections. The strong smell of fuel vapors may also aid diagnosis. Is the indicator ball above the red flag? Compare the flow meter indicator ball reading to the red flag.ĪBOVE the red flag indicates a leak present.īELOW the red flag indicates a sealed system. NOTE: Larger volume fuel tanks, lower fuel levels or if the vehicle is equipped with a Flow Management Valve may indicate high flow and will require 4 to 5 minutes to fill. Press the remote button to activate AIR flow. Install the service port adapter #8404-14 on the vehicle’s service port and block the vent hose of the EVAP Canister (if equipped) or install the #8404-ADP service adaptor into the filter line.Ĭonnect the Air supply hose from the EELD to the service port (if equipped) or to the #8404-ADP adapter. When the calibration is complete, release the remote button. The EELD flow meter is now calibrated in liters per minute to the size leak indicated by the DTC set in the PCM. Position the red flag on the air flow meter so it is aligned with the indicator ball. Insert the tester’s AIR supply tip (clear hose) into the appropriate calibration orifice on the tester’s control panel (based on DTC leak size). Connect the red power lead of the EELD to the battery positive terminal and the black ground lead to battery neg- ative terminal.īlock the vent hose of the canister if using the service port. NOTE: The fuel tank should have between 20% and 80% of fuel tank capacity to properly test the Evap system. WARNING: Keep lit cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases. Keep the test area well ventilated. To continue testing you will need Miller Tool #8404A Evaporative Emission Leak Detector (EELD). Perform a visual and physical inspection of the entire Evaporative Emission system. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) > Refer to the INTERMITTENT CONDITION Diagnostic Procedure. NOTE: A loose gas cap could have caused this DTC to set. Make sure gas cap is tight and in good condi- tion. Make sure the gas cap meets OEM specifications.
NOTE: Since a hot vehicle can conceal a leak, it is best to perform this test at room temperature.