Topaz L4-140 2.3L CFI (1985)
FUEL CHARGING ASSEMBLY (F.C.A.) FUEL PRESSURE REGULATOR, UNDERHOOD FUEL FILTER AND RETURN LINE SYSTEM
CHECK 2.3L HSC CFI-IV - 1985 TEMPO, TOPAZ
TEST STEP
RESULTS
ACTION TO TAKE
STEP 1
Check system fuel pressure using 0-30 psi test
^ Pressure low
^ Perform fuel pump
described in Procedure at idle. System pressure
less than 13 psi
check procedure per
should be between 13-12 psi.
Procedure 1.
^
If pressure is still low, perform FCA injector/ regulator vacuum bleed down system check.
^
Pressure high ^ Connect external fuel greater than 16 psi line from FCA. Outlet to
vehicle tank and retest
-
If O.K. check for blocked or kinked return line.
^
If pressure is still high, check FCA for blockage.
^
Pressure normal ^ Check fuel pump flow
13-16 psi drive concern
per fuel pump check
still present
procedure Procedure 1
Procedure 4 INJECTOR REPLACEMENT
Disassembly
1.
Remove fuel injector retaining screw and retainer.
2.
Remove injector assembly and lower O-ring.
Assembly
NOTE:
This procedure is different from that shown in Shop Manual E, page 24-03-4.
1.
Lubricate new lower O-ring and injector seat area with clean engine oil. (Do not use transmission oil.)
2.
Install lower O-ring on injector.
3.
Lubricate upper O-ring, clean and lubricate throttle body O-ring seat.
4.
Install injector by centering and applying a steady downward pressure with a slight rotational force.
5.
Install injector retainer and retaining screw.
6.
Tighten retainer screw to 2-2.5 N-m (18-22 in.lb.)
7.
Perform Fuel/Charging Assembly lnjector/Regulator - Vacuum Bleed Down System check per Procedure 2.
Technical Service Bulletin # 87197
Date: 870923
Engine - High/Erratic Idle
Article No.
IDLE - ERRATIC OR HIGH - 2.3L HSC CFI -
87-19-7
DIAGNOSTIC AND SERVICE TIPS
FORD:
1985-87 TEMPO
LINCOLN-MERCURY: 1985-87 TOPAZ
ISSUE:
Erratic or high engine idle speed on 1985-87 Tempo/Topaz vehicles with 2.3L HSC CFI may be caused by incorrect setting of the throttle
stop adjusting screw (hard stop), linkage or throttle body binding, TV rod adjustment, or EEC IV processor.
ACTION:
To correct this, use the following service diagnostic procedure.
NOTE:
Before proceeding, make sure there are NO SYSTEM VACUUM LEAKS.
1.
If high idle is not present during initial check, perform EEC IV Self-Test. If Service Codes are present, refer to the Engine/Emission Diagnosis
Shop Manual, Volume H, Section 16 for instructions. For 1987 vehicles (only), if Continuous Service Code 78 appears, follow Pinpoint Test
Q-60. If condition is still present, continue to Step 2.
2.
If learned idle is above specification make sure the throttle plate is free and cruise control cable (if equipped) is not holding the throttle open.