900 L4-1985cc 2.0L (1982)
Coolant Temperature Sensor/Switch (For Computer): Technical Service Bulletins
Engine - Cold Start Driveability Kit
SUBJECT:
SERVICE KIT TO IMPROVE DRIVEABILITY WITH COLD ENGINE - CERTAIN M82 AND ALL M83 NATURALLY - ASPIRATED 900
ISSUE:
(900, 900S)
06/84-692
FILE IN S.I. MANUAL
VOLUME:
I
SECTION:
2
PAGE
164
A service kit (P/N 85-46-921) is now available which alters the function the Lambda system until the engine coolant has risen to 77~F. This allows the
engine and fuel system to stabilize before the Lambda system takes over mixture control and it improves driveability after a cold start of the
naturally-aspirated engine.
The service kit may be fitted to specific naturally-aspirated M82 engines and all M83 naturally-aspirated engines having Lambda Electronic Control Unit
P/N 93-45-216 (Bosch No. 0280-800 054). NOTE: It cannot be used on M82's with alternate "M81" Lambda systems identified by ECU P/N 93-37-718
(Bosch No. 0280-800 035), produced within VIN Serial No. ranges C1012287-29974 and C2006539-10800 (see S.I. 07782-581).
All other naturally-aspirated M82 models may be fitted with the service kit.
Installation Details:
Service Kit P/N 85-46-921 consists of the following individual components:
1 - Temperature Switch 1 - Gasket 1 - Harness 5 - Wire Clips
1.
Drain the engine coolant to below the level of the thermostat housing.
2.
Remove the large plug from the front of the thermostat housing.