Engine - Idle Speed Fluctuates At Stop After Cold Start

Article No.
97-10-2

05/12/97

IDLE - IDLE SPEED FLUCTUATES AT STOP AFTER COLD START

FORD:
1992-94 TEMPO

LINCOLN-MERCURY:
1992-94 TOPAZ

CALIBRATION:
2-26E-R05, 2-26E-R10, 2-26E-R11, 2-26R-R05, 2-26R-R10, 2-26R-R11, 4-26E-R11, 4-26R-R11


WARNING:
THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE. PERFORMING THIS MODIFICATION ON OTHER ENGINE CALIBRATIONS IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.

ISSUE:
Some vehicles may experience the idle speed fluctuating when coming to a stop after a cold start in ambient temperatures between -1 and 10°C (30 and 50°F). The rpm may fluctuate +/- 70 rpms.




PCM Application Chart

ACTION:
Review TSBs 93-12-6, 93-24-8 and 93-26-6 to eliminate other possible concerns. If concern is still present, replace the Powertrain Control Module (PCM). The new PCM has a revised operating strategy to reduce the possibility of idle speed fluctuation. Refer to the following PCM Application Chart and the appropriate year Tempo/Topaz Service Manual for the correct PCM calibration, removal and installation procedures.





Obtain an Authorized Modification Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications 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.

OTHER APPLICABLE ARTICLES: 93-12-6, 93-24-8, 93-26-6

WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATION DESCRIPTION TIME

971002A Replace Powertrain Control 0.5 Hr.
Module (PCM)

DEALER CODING
CONDITION
BASIC PART NO. CODE
RECAL 42

OASIS CODES: 608000, 609000, 610000, 612000, 618400

PART NUMBER PART NAME

F4PZ-12A650-AAB Powertrain Control Module (PCM)
F4PZ-12A650-XB Powertrain Control Module (PCM)
F4PZ-12A650-YB Powertrain Control Module (PCM)
F4PZ-12A65O-ZB Powertrain Control Module (PCM)