Engine Control Module: All Technical Service Bulletins
Engine - Extended Crank Time Stalling Rough Idle
A HARD START - 5.0L EH - AFTER FOUR HOUR SOAK - VEHICLES WITH
A IDLE - ROUGH - 5.0L EH - AFTER FOUR HOUR SOAK - VEHICLES WITH
A STALL - 5.0L EH - AFTER FOUR HOUR SOAK - VEHICLES WITH
Article No. 89-22-6
LIGHT TRUCK: 1987-S9 BRONCO, ECONOLINE: F-150: F-250
This TSB article is being republished in its entirety to include all of the following engine
calibrations regardless of "R" level.
CALIBRATION: 7-54E-R: 7-54J-R: 7-54K-R; 7-54R-R: 7-54S-R: 7-54T-R: S-54V-R:
7-54W-R: S-54Y-R: 7-54Z-R
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:Extended crank time in excess of five seconds, stalling at idle after initial cold
start-up or a rough idle condition in ambient temperatures of 50~F (10~C) or
above may be caused by the strategy of the EEC IV processor. This condition
usually occurs after soak-times of four hours or longer.
ACTION:Install a new EEC IV processor with revised operating strategy. Refer to the
following procedure for service details.
1.Perform an EEC IV Quick Test and correct service code(s) as required. If no service
codes are present and the symptom still exists, proceed to Step 2.
2.Install a new EEC IV processor. Refer to the EEC IV PROCESSOR APPLICATION
CHART for the correct service part.
NOTE:AN IDLE ADJUSTMENT WILL NOT BE REQUIRED.
EEC IV PROCESSOR - APPLICATION CHART
NO. PART NUMBER
Obtain an Authorized Modifications Decal and list the date, dealer number, and summary
of alterations performed. Select a prominent place adjacent to the Vehicle Emission Control