Tempo L4-122 2.0L DSL (1984)
Thermostat: All Technical Service Bulletins
Cooling System - New System Diagnostics
Article No.
93-24-8
11/24/93
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HESITATION - ROUGH IDLE - ENGINE COOLANT DOES NOT REACH NORMAL OPERATING TEMPERATURE - MEDIUM TRUCKS
WITH 7.0L ENGINES
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HESITATION/STALL DURING ACCELERATION OR DECELERATION
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IDLE - ROUGH - ENGINE COOLANT DOES NOT REACH NORMAL OPERATING TEMPERATURE
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HEATER/DEFROSTER - POOR HEATER OUTPUT - THERMOSTAT STUCK OPEN
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COOLING SYSTEM - NEW DIAGNOSTICS FOR ENGINES THAT DO NOT REACH NORMAL OPERATING TEMPERATURE
FORD:
1983-94 ESCORT
1984-87 EXP
1984-94 CROWN VICTORIA, MUSTANG, TEMPO, THUNDERBIRD
1986-94 TAURUS
LINCOLN-MERCURY:
1984-86 CAPRI
1984-87 LYNX
1984-92 MARK VII
1984-94 CONTINENTAL, COUGAR, GRAND MARQUIS, TOPAZ, TOWN CAR
1986-94 SABLE
1988-89 TRACER
1991-94 CAPRI, TRACER
MERKUR:
1985-89 XR4TI
1988-89 SCORPIO
LIGHT TRUCK:
1984-94 BRONCO, ECONOLINE, F-150-350 SERIES, RANGER
1985-90 BRONCO II
1986-94 AEROSTAR
1988-94 F SUPER DUTY
1991-94 EXPLORER
This TSB article is being republished in its entirety to include 1994 model year vehicles.
ISSUE:
Engine performance concerns such as hesitation or stall, rough idle, and/or poor fuel economy may be caused by the thermostat stuck in an open position
or opening at a temperature lower than specified.
ACTION:
