Engine Controls - Heavy Chuggle, Surge at 35 to 55 MPH
Model Year 1983Bulletin No. 83-234
File In Group 64
Number 21
Date Oct. '84
SUBJECT: DRIVEABILITY CORRECTION FOR HEAVY CHUGGLE AND SURGE - 35 TO 55 MPH
MODELS AFFECTED: 1982 & 1983 4.1L EQUIPPED REGALS.
A recalibrated PROM, EGR valve, EGR relay, and a wiring harness to install the relay are now available in limited quantities to correct this condition.
The following kit part #25522748 should be ordered from WDDGM and installed on the vehicle per the instructions contained in this bulletin.
NOTICE: All parts contained in this kit must be installed for correction.. If not, performance and detonation conditions will occur.
Procedure
1) Disconnect positive battery cable.
2) Remove ECM and housing from body kick panel.
3) Connect jumper harness provided to relay.
FIGURE 2:
FIGURE 3:
4) Solder splice jumper harness into the following wire leads going to the lettered ECM connector of the ECM harness; See Figures 2 and 3.
Note: Use only Rosin core solder for all solder splices.
ECM HARNESS CONNECTOR
Cavity Circuit Wire Color
P 422 Tan/Blk Str
T 435 Gray
C 439 Pink/Blk Str
A 450 Black
RELAY JUMPER HARNESS Wire Color
Tan/Blk Str Gray Pink/Blk Str Black
FIGURE 4 - ENCLOSE RELAY CONNECTORS & WIRING INSIDE FOAM MATERIAL.:
5) Tape each wire splice.
6) Wrap relay in foam sound deadener provided, See Figure 4.
FIGURE 1:
7) Tape jumper harness and relay to ECM harness, See Figure 1 for locations.
8) Install New PROM into ECM, reinstall ECM and housing.
9) Install EGR valve per Chassis Service Manual procedures.
10) Reconnect battery cable.
For payment of warranty claims the following operation number, time allowance and failure code should be used.
Operation Number: T5067
Labor Time Allowance : 0.7
Failure Code: 92
Notice: Part numbers for Relay, EGR valve, and Prom contained in the kit are being provided in the event an individual part is needed for future repairs.
Wiring Harness Jumper - 12043500
Relay - 25522747
Foam - 25522723
EGR - 17079799
PROM - 1226913