Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSOLDSMOBILE1997LSS V6-3.8L VIN KREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSEVAP SYSTEM - SPECIAL TOOL USAGEVERIFICATION PROCEDURE
1997 Oldsmobile LSS V6-3.8L VIN K
Verification Procedure
1997 Oldsmobile LSS V6-3.8L VIN KSECTION Verification Procedure
Service Bay Test
Important:
Disconnect the fuel fill cap adapter and install the fuel fill cap onto the.vehicle prior to performing the EVAP Service Bay Test.
Perform the EVAP Service Bay Test (if available) using a scan tool. If the Service Bay Test is not available, proceed to Flow Meter Test.
The Service Bay Test will verify the proper operation of the EVAP system and reset the Emissions Inspection/Maintenance EVAP flag.
Results
^ If the Service Bay Test is passed, testing is complete.
^ If the Service Bay Test is not passed, return to the appropriate Service Information.
Flow Meter Test
The flow meter test must be used to verify repairs on vehicles with enhanced EVAP systems that do not have the EVAP Service Bay Test.
1. Turn the nitrogen/smoke valve to nitrogen.
2. Disconnect the nitrogen/smoke hose from the fuel fill cap adapter.
3. Connect the nitrogen/smoke hose to the correct test orifice on the bottom-front of the EEST. The correct test orifice can be determined by referencing the table.
4. Use the remote switch to activate the EEST.
5. Align the red flag on the flow meter with the floating indicator. Use the remote switch to de-activate the EEST.
6. Remove the nitrogen/smoke hose from the test orifice and reinstall the hose onto the fuel fill cap adapter.
7. Turn ON the ignition with the engine OFF.
8. Command the EVAP vent valve closed with a scan tool.
Important:
Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
9. Use the remote switch to introduce nitrogen and fill the EVAP system. Watch the floating indicator until it stabilizes.
10. Compare the flow meter's stable floating indicator position to the red flag. If the indicator floats:
^ ABOVE the red flag-UNACCEPTABLE (EVAP system leak still exists-go to Enhanced EVAP System Leak Detection Procedure earlier in this bulletin).
^ BELOW the red flag-ACCEPTABLE (PASS-test complete).
The chart shown should be used to select the correct orifice for the Verification Process if the Service information does not specifically list the information.
Important:
Disconnect the fuel fill cap adapter and install the fuel fill cap onto the.vehicle prior to performing the EVAP Service Bay Test.
Perform the EVAP Service Bay Test (if available) using a scan tool. If the Service Bay Test is not available, proceed to Flow Meter Test.
The Service Bay Test will verify the proper operation of the EVAP system and reset the Emissions Inspection/Maintenance EVAP flag.
Results
^ If the Service Bay Test is passed, testing is complete.
^ If the Service Bay Test is not passed, return to the appropriate Service Information.
Flow Meter Test
The flow meter test must be used to verify repairs on vehicles with enhanced EVAP systems that do not have the EVAP Service Bay Test.
1. Turn the nitrogen/smoke valve to nitrogen.
2. Disconnect the nitrogen/smoke hose from the fuel fill cap adapter.
3. Connect the nitrogen/smoke hose to the correct test orifice on the bottom-front of the EEST. The correct test orifice can be determined by referencing the table.
4. Use the remote switch to activate the EEST.
5. Align the red flag on the flow meter with the floating indicator. Use the remote switch to de-activate the EEST.
6. Remove the nitrogen/smoke hose from the test orifice and reinstall the hose onto the fuel fill cap adapter.
7. Turn ON the ignition with the engine OFF.
8. Command the EVAP vent valve closed with a scan tool.
Important:
Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
9. Use the remote switch to introduce nitrogen and fill the EVAP system. Watch the floating indicator until it stabilizes.
10. Compare the flow meter's stable floating indicator position to the red flag. If the indicator floats:
^ ABOVE the red flag-UNACCEPTABLE (EVAP system leak still exists-go to Enhanced EVAP System Leak Detection Procedure earlier in this bulletin).
^ BELOW the red flag-ACCEPTABLE (PASS-test complete).
The chart shown should be used to select the correct orifice for the Verification Process if the Service information does not specifically list the information.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.