Subject: | Engine Stalls After Initial Start /Hesitates During Launch/Surge During Light Acceleration, or Has Increased, and/or Fluctuating Idle that is More Pronounced with A/C On (install New PCM Calibration) Due to additional subject information and a revised procedures, this bulletin cancels and supercedes (with a new bulletin number) bulletin 92-T-35 (Corporation No. 286503), which should be discarded. |
Models: | 1992 Saturns with DOHC (LLO) engines. |
Some customers of 1992 Saturn, equipped with DOHC (LLO) engines may comment that the engine exhibits one or more of the following conditions:
• | Engine stalls after initial start. |
• | Hesitates during launch. |
• | Surges during light acceleration |
• | Increased and/or fluctuating idle that is more pronounced with the A/C On. |
Due to engine sensitivity to variations in cool ambient temperatures along with the 1992 Federal regulations addressing Spring and Summer fuel grade volatility, initial start- up and warm -- up driveability has been impacted.
Verify that one or more of the conditions listed above exist.
If any of these conditions exit, proceed with the steps listed under "PROCEDURE," on the next page.
Important: Before installing a new calibration with the correct engine calibration,
1992 CALIBRATIONS - DOHC (LLO) ENGINES | ||
ECM | TCM | Application |
2303 | 2548 | Automatic transaxles. Vehicles built before VIN NZ205625 (excluding NZ200001 through NZ20010) |
2303 | 8520 | All other automatic transaxle |
2302 | Manual transaxle |
Important: Verify that the concern has been repaired. If problem still exits, refer to diagnostic procedures in the "Fuel/Air Intake/Exhaust Service Manual," and/or "Electronic Engine Controls Service Manual."
To receive credit for this repair, submit a claim through the Saturn Dealer System as follows:
Case Type | Description | Labor Operation Code | Time |
VW | PCM EC/TC Calibration (Includes PDT Parameter and Diagnostic Trouble Codes/Information Flag Checks) | T9622 | 0.3 hrs |