240 L4-2127cc 2.1L SOHC Turbo B21FT FI (1982)
Fuel Pressure Regulator: Customer Interest
Engine - Erratic Idle or Poor Response
Subject:
Product
MODIFIED CONTROL
CARS
PRESSURE REGULATOR
1981-83 CI SYSTEM
Group
B21F, B21F MPG,
B21FT
23
Date:
No.
June ,1983
115
THIS SERVICE BULLETIN IS APPLICABLE TO THE U.S. AND CANADIAN MARKETS.
If erratic idle or poor engine response is experienced after cold start at ambient temperatures below 60~F, and all engine settings are correct, the
complaint can be rectified by installation of a modified control pressure regulator.
Bosch P/N
Volvo P/N
Early version
......079
1276878-4
New version
......123
1336475-7
The new control pressure regulator has two resistors in shunt and will give the following
resistance:
Below +53~F
:
33.3 - 36.7 ohms
Above +63~F
:
11.7 - 12.9 ohms
This results in a longer "choke" time in cold weather compared with the earlier CPR.
NOTE! On the earlier CPR the wires can be connected to either terminal. However, on the new CPR, the wires must be connected as shown, otherwise
No. 7 fuse will blow.
The new CPR was fitted on B21FT 1983 model year as follows:
499800 ( M46) Engine # 4314 - 499801 (AW71) Engine # 3406 -
