Topaz L4-140 2.3L CFI (1985)
Idle Speed: All Technical Service Bulletins
Engine - Rough Idle/Surge/Stalling
Article No.
5-14-14
STALLING - ENGAGEMENT/DECEL/IDLE/PARKING MANEUVERS - 2.3L HSC CFI
SURGE - DECEL BUCKING/TRAILER HITCHING - 2.3L HSC CFI
IDLE - ROUGH/ROLLING - 2.3L HSC CFI
FORD
1985 TEMPO
LINCOLN-MERCURY
1985 TOPAZ
If, after performing normal diagnostics, the vehicle still exhibits some or all of the detailed symptoms listed below, perform the following checks and/or
procedures:
STALLING
^
On engagement after initial cold Start 1*
^
Following a decel (Hot/Cold)
^
At idle (Hot/Cold)
^
When turning steering wheel against stops, for example: parallel parking maneuver (Hot/Cold).
^
On Hot/Hard restarts.
ROUGH IDLE
^
Engine speed may be unstable for brief periods or continuously.
^
Engine speed may roll up and down from 500 RPM to 1600 RPM slowly and/or intermittently.
SURGING
^
Surges at highway speeds light loads.
^
Decel bucking/trailer hitching. 1* Strategy requires engagement within 20 seconds after start (reference TSB 85-14-13).
Vehicle System Checks:
1.
Check that all electrical and vacuum connections of the engine control system are properly attached utilizing visual inspection and wiggle test.
(Pay particular attention to ACT, MAP and TFI connections).
2.
Check base engine timing and reset to 10 degrees BTDC as required. If pings/knocks are present set to 8 degrees.
NOTE:
If timing is adjusted then an Authorized Modifications sticker should be installed noting changes.
Authorized Modification decal
Obtain an Authorized Modification decal and list the date, dealer number and summary of alterations performed. Select a prominent place adjacent to the
Vehicle Emission Control Information decal suitable for installing the Authorized Modifications decal. Clean the area, install the decal and cover it with
a clear plastic decal shield.
3.
Check for proper fuel pump/check valve operation. (See Procedure 1, page 35). Check for injector/regulator integrity. (See Procedure 2 on page
37). Check integrity of fuel pressure regulator, fuel filter and fuel return line. (See Procedure 3 on page 38).
4.
Check the throttle stop screw and adjust to 590 RPM (ATX) 640 RPM (MTX) maximum. Check TV Linkage Rod adjustment per TSB 85-9-29.
