Intrepid V6-3.2L VIN J (1998)
Technical Service Bulletin # 18-09-98B
Date: 980612
PCM - No Engine Restart/Rough Idle After Hot Soak
NO: 18-09-98 Rev. B
GROUP: Vehicle Performance
DATE: Jun. 12, 1998
SUBJECT:
No Restart/Rough Idle
After A Hot Soak
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-09-98 REV. A, DATED MAR. 13, 1998, WHICH SHOULD BE
REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDES NEW SOFTWARE FOR
ALL APPLICATIONS, THE ADDITION OF THE 3.5L ENGINE, AND ADDED PROCEDURES FOR THE 2.7L ENGINE.
MODELS:
1998
(LH)
Concorde/Intrepid
**1999
(LH)
LHS/300M**
**NOTE:
THE SOFTWARE CHANGE APPLIES TO ALL VEHICLES BUILT PRIOR TO MAY 12, 1998 (MDH 0504XX) AND THE 2.7L
THERMOSTAT MODIFICATION APPLIES TO ENGINES WITH BUILD CODES PRIOR TO 04120198 (THE ENGINE BUILD DATE IS
LOCATED ON A LABEL ATTACHED TO THE LEFT REAR VALVE COVER). IN-PLANT MODIFIED THERMOSTATS MAY HAVE A
WHITE PAINT DOT ON THE THERMOSTAT HOUSING.**
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 vehicles may not restart until the
engine cools. Fuel vapor build up in the fuel rail may be the cause for these conditions.
DIAGNOSIS:
Using the Diagnostic Scan Tool (DRB III(R)) 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 a fuel pressure gauge Miller Tool C4799 to the service port
for the 3.2L or **3.5L** engine. On 2.7L engines, use Miller Tool C4799 plus adapter 6539. Perform fuel bleed procedures on the 2.7L and disconnect
the quick connect fuel line at the rear of the engine, just below the throttle body (Figure 1). Connect the adapter 6539 to the fuel line and the pressure
gauge C4799 to the adapter.
Switch the ignition key to the "run" position 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. **Additionally, If the vehicle has a 2.7L engine perform the thermostat modification and heater hose modification Repair
