Escort L4-98 1.6L SOHC VIN 5 FI (1985)
Fuel Injector: All Technical Service Bulletins
Engine - Hesitation/Lack Of Power/Rough Idle
FUEL INJECTORS - DIAGNOSTIC AND CLEANING TIPS
Article No. 88-17-11
FORD:
1983-88 ESCORT, THUNDERBIRD
1984-88 EXP
1986-88 MUSTANG, TAURUS, CROWN VICTORIA
1988 TEMPO
LINCOLN-MERCURY: 1983-86 LYNX
1983-88 COUGAR
1986 CAPRI
1986-88 SABLE, GRAND MARQUIS, MARK VII, CONTINENTAL, LINCOLN TOWN CAR
1988 TRACER, TOPAZ
MERKUR:
1987-88 XR4Ti
1988 SCORPIO
LIGHT TRUCK:
1985-88 RANGER, F-SERIES, BRONCO
1986-88 E-SERIES, AEROSTAR
ISSUE:
Port fuel injected vehicles that have cold hesitation, lack of power, rough engine idle or a surging condition at steady speeds may be caused
by dirty fuel injectors. When no-detergent fuel is used, deposits form on the fuel metering surfaces of the fuel injectors. The deposits that
form reduce the fuel flow resulting in a lean condition.
ACTION:
To correct this, follow normal diagnostics as shown in the Engine/Emissions Diagnosis Manual, Section 2. If you get to a step that instructs
you to replace a fuel injector, FIRST try cleaning the injector with the Rotunda Tester/Cleaner, 113-00001. If the condition still exists after
cleaning, the injectors should be flow tested to make sure they are functioning properly. If the flow test indicates lean injectors, a second
cleaning may be necessary because of severe injector fouling. Refer to the diagnostic chart on page 69 of this TSB for step-by-step
instructions.
CAUTION: NEVER ATTEMPT TO FLOW TEST INJECTORS WITH THE CLEANING SOLUTION MIXTURE. THIS WILL PRODUCE FALSE
TEST RESULTS. ONLY USE CLEAN GASOLINE.
In cases where fouled injectors were the cause of the driveability concern, it should be recommended to the customer that a better quality gasoline be
used. The Owner Guide, Maintenance Schedule and Operating Guide address the fuel quality issue.
NOTE:
IT IS VERY IMPORTANT THAT THE CORRECT CLEANING SOLVENT IS USED WITH THE ROTUNDA TESTER/CLEANER. THE
CORRECT CLEANING SOLVENTS ARE:
Power Flush Injector
Fluid
E6AZ-19579-C
Carburetor and
Combustion
Chamber Cleaner
D9AZ-19579-B
DO NOT USE
Injector and Fuel System
Cleaner
E6AZ-19579-A
Rotunda Tester/Cleaner Equipment Update
The following items are available for use with the Rotunda Tester/Cleaner:
a.
3.8L ENGINE INJECTOR ADAPTER HARNESS 113-00005 To flow test injectors on the 1988 3.8L with EFI, a wire harness is available to
allow a direct connection to the injector harness 8-pin connector.
b.
2B SPAN TUBE 113-00003 To flow test the Tracer 1.6L, Light Truck 7.5L and 3.8L supercharged engine.
CAUTION: NEVER LEAVE CLEANING SOLUTION IN THE ROTUNDA TESTER/CLEANER. ALWAYS DRAIN THE TANK AND LINES
