Skyhawk L4-121 2.0L VIN P TBI (1984)
PROM - Programmable Read Only Memory: Recalls
Service Procedure
PREVIOUSLY SERVICED VEHICLES - The check engine light malfunction may be remedied by the installation of the correct replacement prom
identified in this reissued bulletin. In addition 1983 model years will require a new tune up label, P/N 14100954. No further action will be required.
VEHICLES NOT PREVIOUSLY SERVICED - The following procedure will provide a significant improvement in cold startability of these vehicles.
1.
Install a new calibration prom per the following:
A.
On 1983 models use P/N 1227253, prom.
INSTALL (NEXT TO PRODUCTION LABEL) SUPPLEMENTARY TUNE-UP LABEL, P/N 14100954 FOUND IN PROM PACKAGE.
B.
On 1984 models with base axle (3.18) use P/N 1227255, prom. (Refer to service part Identification Label).
C.
On 1984 models with FW9 (3.43) axle, use P/N 1227257, prom. (Refer to service parts Identification Label) .
2.
On 1983 models set ignition timing to 6~ BTDC from 0~ TDC. On 1984 models timing should be checked to assure 6~ BTDC.
THE TIMING CONNECTOR MAY BE LEFT DISCONNECTED FOR THE NEXT STEP.
3.
Install spark bypass relay kit, P/N 14086983 (1983-1984). Detailed instructions are included in the kit package. Reconnect the timing connector
from Step #2.
4.
REMOVE AND DISCARD THE FUSE labeled "crank" from the fuse block #2 position (3 amp fuse) (1983-1984).
5.
Install new spark plugs, P/N 5614009 (1983-1984).
6.
Install starting procedure label, P/N 14085150, on headliner side of drive sun visor. Required on all 1983 models and as required on 1984 models
(installed in production Mid - 1984).
THE OWNERS OF SKYHAWK VEHICLES SHOULD BE ADVISED COLD WEATHER STARTING PERFORMANCE IS ALSO DEPENDENT
ON THE USE OF 5W-30 SF OIL AS SPECIFIED IN THE
OWNER'S MANUAL.
REIMBURSEMENT:
Claims for customer reimbursement or previously paid repairs are to be submitted to the Buick Zone Office for review and disposition.
