PCM - No Engine Restart/Rough Idle After a Hot Soak.
NO: 18-09-98 Rev. AGROUP: Vehicle Performance
DATE: Mar. 13, 1998
SUBJECT:
No Restart/Rough idle After A Hot Soak
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-09-98, DATED FEB. 27, 1998, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE THE ADDITION OF THE 2.7L ENGINE.
MODELS:
1998 (LH) Concorde/Intrepid
SYMPTOM/CONDITION:
Some vehicles may exhibit a hot engine no start, hot engine restart with a rough idle, or hot engine restart/die-out. Some vehicles may also exhibit misfire DTC's. This condition occurs after a 10 to 20 minute hot soak and may be aggravated by alcohol blended fuels. Some vehicle may not restart until the engine cools. Fuel vapor build-up in the fuel rail may be the cause of these conditions.
DIAGNOSIS:
**Using the Diagnostic Scan Tool (DRB III) with the appropriate Diagnostic Procedures Manual, verify all engine/transmission systems are functioning as designed**. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order and repair as necessary before proceeding further with this bulletin. Cold soak the vehicle outdoors or in the shop for a minimum of 8 hours. Connect as fuel pressure gauge Miller Tool C4799 to the service port on the 3.2L. **On 2.7L engines, use Miller Tool C4799 plus adapter 6539. Perform fuel bleed procedures and disconnect the quick connect fuel line at the rear of the engine, just below the throttle body. Connect the adapter 6539 to the fuel line and the pressure gauge C4799 to the adapter.** Switch the ignition key to the "run" while monitoring fuel pressure. **Do not start the vehicle.** **Allow the fuel pressure to stabilize (approximately 48 to 50 psi) and switch the ignition key to "off".** Monitor the fuel pressure gauge for 15 minutes. If the fuel pressure drops 20 PSI or more, the fuel pump module will require replacement along with the flash update Repair Procedure. If the fuel pressure drops less than 20 PSI, perform the flash update Repair Procedure only.
NOTE:
WHENEVER A POWERTRAIN CONTROL MODULE (PCM) IS REPLACED DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT CONTROLLER SHOULD BE VERIFIED FOR THE LATEST REVISION LEVEL USE THE LASH PROCEDURE TO UPDATE REPLACED CONTROLLERS AS NECESSARY.
EQUIPMENT / PARTS REQUIRED:
1 CH6000 Scan Tool (DRB III )
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7000 / 7001 J1962 Cable
1 04669020 Label - Authorized Software Update
1 04275086 Label - Authorized Modification
AR(1) 5003958AA Module, Fuel Pump
1 C4799 Fuel Gauge, Miller
1 6539 Gauge Adapter, Miller (For 2.7L Engine)
NOTE:
THE MDS AND DRB III ARE REQUIRED TO PERFORM THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL CD RELEASE **1153** OR HIGHER MUST BE INSTALLED.
REPAIR PROCEDURE:
This bulletin involves replacing the fuel pump module if required (per the diagnosis section) and/or selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration changes).
NOTE:
THE FLASH PORTION OF THIS BULLETIN APPLIES TO VEHICLES WITH 3.2L ENGINES BUILT PRIOR TO FEB. 16, 1998 MDH (0216XX) AND 2.7L ENGINES BUILT PRIOR TO MAR. 9, 1998 MDH (0309XX).**
1. If necessary, follow the procedures listed in the, service manual publication number 81-270-8140 to replace the fuel pump module. Follow the reflash procedures after fuel pump module replacement. If fuel pump module replacement is not required, perform the following reflash procedure only.
2. Connect the MDS (Mopar Diagnostic System) and DRB III (Scan Tool) to the vehicle and power them up.
3. Use the arrow keys and select # 2 MDS DIAGNOSTICS on the DRB III MAIN MENU Screen.
4. Use the arrow keys and select DIAGNOSTIC MENU on the MDS, then press NEXT MENU.
5. Use the arrow keys and select VEHICLE CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.
6. Use the arrow, keys and select PROGRAMMING OF ALL OTHER CONTROLLERS USING MDS & DRB III on-the MDS, then press NEXT MENU.
7. Follow the steps presented on the MDS and DRB III which will allow the DRB III to obtain the current part number of the PCM.
8. The MDS will display the part number of the PCM on the vehicle and the appropriate replacement part number, then press NEXT MENU to begin programming.
If the PCM on the vehicle has already been updated or programmed, a NO UPDATES AVAILABLE message will be displayed. Check the part number of the PCM on the vehicle and compare it to the part number displayed. If the PCM has already been updated, then another condition exists that will require further diagnosis and repair.
9. The MDS and DRB III will prompt for any operator action needed during the remainder of the programming process.
NOTE:
THE FOLLOWING STEPS ARE REQUIRED BY LAW.
10. Type the necessary information on the "Authorized Software Update Label" p/n 04669020 (Figure 1) Attach the label to the PCM and cover the label with the clear plastic overlay.
11. Type the necessary information on the "Authorized Modification Label" p/n 04275086 and attach the label near the VECI Label (Figure 2).
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-49-98 Module, Powertrain Control Reprogram 0.5 Hrs.
14-50-01-90 Module, Fuel Pump Replace 0.8 Hrs.
FAILURE CODE: FM - Flash Module P8 - New Part