Tempo L4-140 2.3L HSC (1986)
Cruise Control Servo: All Technical Service Bulletins
Speed Control - Inoperative or Delayed Response Time
SPEED CONTROL - 2.3L OHC AND 2.3L HSC - INOPERATIVE OR DELAYED RESPONSE TIME
Article No. 88-12-8
FORD:
1985-87 MUSTANG, TEMPO
LINCOLN-MERCURY: 1985-86 CAPRI 1985-87 TOPAZ
This article is being republished to expand the applicable model year to cover 1985 vehicles.
ISSUE:
Inoperative speed control or speed control with delayed response time in cold ambient temperatures may be caused by moisture produced by
the engine getting into the vehicle vacuum system and entering the speed control servo. The moisture may freeze or produce corrosion
build-up in the speed control servo.
ACTION:
To correct this, install a new speed control servo and vacuum check valve. The vacuum check valve will prevent moisture from entering
the speed control servo. Refer to the following service procedure.
1.
Remove the speed control servo.
2.
Dry out all speed control servo vacuum source hoses.
3.
Install a new speed control servo, E4LY-9C735-A for Mustang/Capri or E2FZ-9C735-A for Tempo/Topaz.
CAUTION: INSTALL VACUUM CHECK VALVE WITH END LABELED "VAC" TOWARDS THE VACUUM SOURCE.
4.
Install the inline vacuum check valve as follows:
a.
Mustang/Capri
Remove the connector at the end of the extension hose and install the vacuum check valve, (E3ZZ-9C793-B). The extension hose connects the
speed control servo vacuum hose to the vacuum outlet manifold.
NOTE:
VEHICLES NOT EQUIPPED WITH AN EXTENSION HOSE MUST HAVE THE SERVO VACUUM HOSE CUT THREE (3) INCHES
FROM THE VACUUM OUTLET MANIFOLD. AFTER THE HOSE IS CUT, INSTALL THE VACUUM CHECKVALVE IN-BETWEEN
THE CUT HOSE.
b.
Tempo/Topaz
Cut the speed control servo vacuum source hose four (4) inches from the speed control servo. Install the vacuum check valve, (E3ZZ-9C793-B)
in-between the cut hose.
PART NUMBER
PART NAME
CLASS
E3ZZ-9C793-B
Vacuum Check Valve
C
E4LY-9C735-A
Speed Control Servo
A
E2FZ-9C735-A
Speed Control Servo
AM
OTHER APPLICABLE ARTICLES: Supersedes 88-2-5
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION: 881208A
TIME:
0.3 Hr. -Tempo/Topaz 0.7 Hr. - Mustang/Capri
DLR. CODING:
Basic Part No. 9C735
Condition Code: 09
