XJR (X300) L6-4.0L SC (AJ16) (1995)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
ECM - Idle Instability/Hesitation Following Cold Start
05.1-09
DATE
2/95
Sedan Range
MODEL
1995 MY Sedan (4.0L) Range
VIN
As listed
SERVICE TECHNICAL BULLETIN
EMS - Cold Idle Instability, Abrupt Low Speed Throttle Transition Warm, Hesitation/Instability at 50/60 MPH (80-100 KM/H) - Repair Procedure
ISSUE:
1995 MY vehicles in the model and VIN ranges listed may display the following symptoms.
SYMPTOMS
Idle hesitation or instability following cold start.
Hesitation or instability at cruising speeds of 50 - 60 mph (80-100 km/h).
Throttle abruptness ("lurching" or hesitation) at low speed, low throttle application with a warm engine.
MODEL
VIN RANGE
Sedan (4.0L NA)
VIN 720001 - 724499
Range 1995 MY
XJR Sedan
VIN 720001 - 740020
These symptoms result from an unfavorable combination of fuel volatility and ignition timing factors. The ECM EPROM has been revised to correct
these conditions from VIN 724500 Sedan (4.0L NA) Range, VIN 740021 XJR Sedan and VIN 197550 XJS (4.0L) Range.
ACTION:
If customers complain of the symptoms listed on vehicles within the quoted VIN range and all other engine parameters are within specification, the ECM
will require upgrading. To upgrade an ECM to the latest specifications, follow the procedure outlined.
ECM UPGRADE PROCEDURE
1.
Complete the Dealer Supplied Information section on a photocopy of the attached Engine Management EPROM Upgrade form.
2.
Call the Jaguar Technical Hotline (1-800-910-8324).
3.
The Jaguar Technical Service Representative will verbally request the Dealer Supplied Information from the form and assign a Case Number
which must be written on the form.
NOTE:
A copy of the completed Engine Management EPROM Upgrade form must be retained in the vehicle service file.
4.
Ship the ECM together with a copy of the completed form and a return address label showing the Repair Order Number to Lucas Industries, Inc.,
via Federal Express Priority Overnight Service. The following information must be included on the Federal Express Airbill.
Recipient's Address:
EPROM Upgrade
Lucas Industries, Inc.
4 William Demarest Place
Waldwick, NJ 07463
Recipient's Phone Number: