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 USAGEFUEL TANK PRESSURE (FTP) SENSOR CHECK
1997 Oldsmobile LSS V6-3.8L VIN K
Fuel Tank Pressure (FTP) Sensor Check
1997 Oldsmobile LSS V6-3.8L VIN KSECTION Fuel Tank Pressure (FTP) Sensor Check
The J 41413-200 EEST provides a tight seal to the nitrogen/smoke hose when the tester is turned off. This allows pressurizing of the sealed EVAP system. Use the following procedure to test for a functional FTP sensor.
1. Turn ON the ignition with the engine OFF.
2. Connect the EEST red battery clip to the positive (+) battery terminal. Connect the black battery clip to chassis ground.
3. Install the appropriate fuel fill cap adapter to the fuel fill pipe. Refer to the Service Information for the appropriate fuel fill cap adapter part number.
4. Connect the EEST's nitrogen/smoke supply hose and vehicle fuel fill cap to the adapter.
5. Compare the FTP parameter, with a scan tool, to the EEST pressure/vacuum gage.
6. If the FTP parameter is not within 1 in H20 of the EEST pressure/vacuum gage, replace the FTP sensor.
7. Command the vent valve closed with a scan tool.
8. Turn the nitrogen/smoke valve on the EEST control panel to Nitrogen.
9. Use the remote switch to introduce nitrogen into the EVAP system.
10. Observe the Fuel Tank Pressure (FTP) parameter with a scan tool. The FTP sensor parameter should increase to more than 5 in H20.
11. If the FTP parameter is not more that 5 in H20, replace the FTP sensor.
12. If the FTP parameter is more than 5 in H20, continue with appropriate Service Information.
1. Turn ON the ignition with the engine OFF.
2. Connect the EEST red battery clip to the positive (+) battery terminal. Connect the black battery clip to chassis ground.
3. Install the appropriate fuel fill cap adapter to the fuel fill pipe. Refer to the Service Information for the appropriate fuel fill cap adapter part number.
4. Connect the EEST's nitrogen/smoke supply hose and vehicle fuel fill cap to the adapter.
5. Compare the FTP parameter, with a scan tool, to the EEST pressure/vacuum gage.
6. If the FTP parameter is not within 1 in H20 of the EEST pressure/vacuum gage, replace the FTP sensor.
7. Command the vent valve closed with a scan tool.
8. Turn the nitrogen/smoke valve on the EEST control panel to Nitrogen.
9. Use the remote switch to introduce nitrogen into the EVAP system.
10. Observe the Fuel Tank Pressure (FTP) parameter with a scan tool. The FTP sensor parameter should increase to more than 5 in H20.
11. If the FTP parameter is not more that 5 in H20, replace the FTP sensor.
12. If the FTP parameter is more than 5 in H20, continue with appropriate Service 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.