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HOMESERVICE MANUALSPONTIAC19846000 STEREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM1.8L/2.5L/5.7L TBI TESTSFIELD SERVICE MODE CHECKNOTES
1984 Pontiac 6000 STE

Field Service Mode Check: Notes

1984 Pontiac 6000 STESECTION Notes
  1. This test confirms proper operation of fuel system and verifies Closed Loop operation. Clear codes and perform this test after any repair is completed.
  2. When performing this check, always engage parking brake and block DRIVE wheels. Parking brake on front-wheel drive models does not hold drive wheels.
  3. On some engines, the oxygen sensor will cool off after only a short period of time while engine is idling. This will cause engine to go into open loop. To restore closed loop mode, run engine at part throttle several minutes and accelerate from idle to part throttle several times.
NOTE: The FIELD SERVICE MODE CHECK is an integral part of the DIAGNOSTIC CIRCUIT CHECK flow chart. Be sure to start at the beginning of the DIAGNOSTIC CIRCUIT CHECK to ensure that all problems have been diagnosed and repaired before proceeding to the FIELD SERVICE MODE part of the diagnostic chart.
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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.