4.9L Eng Code 18 Service Code - Code Validate/Repair (87-24-17)
WARNING: This page is about the Bronco 4.9 Y, Automatic, which is a different variant/trim than selected.
Publication date: 1987-12-04Reference number: 87-24-17
4.9L ENG CODE 18 SERVICE CODE - CODE VALIDATE/REPAIR
TECHNICAL SERVICE BULLETIN
Reference Number(s): 87-24-17
EEC IV QUICK TEST - 4.9L - SERVICE CODE "18" DISPLAYED IN ERROR
Model FORD LIGHT TRUCK: 1988 E-SERIES, F-SERIES, BRONCO
Group Accessories & Electrical
Bulletin No. 87-24-17
Date December 4, 1987
Symptom Service Code "18" - Display Error
ISSUE:
Service code "18" (SPOUT circuit open) may be displayed
during Engine Running Self-Test in error on light trucks
with less than 1000 miles ( 1600 kilometers). The SPOUT
circuit test is performed by the EEC IV processor changing
spark timing and then measuring the engine RPM drop. High
internal engine friction during the first 1000 miles could
cause an insufficient engine RPM drop that could result in
service code "18".
ACTION:
If service code "18" is displayed while performing the
Engine Running Self Test, make sure service code "18" is
valid by using the following diagnostic procedure.
- Check to make sure the SPOUT circuit connector jumper bar is correctly installed. Service as required.
- Re-run Engine Running Self-Test. During the two (2) minute timing delay, check to see if the timing is to the base timing specification of +20 degrees + or -3 degrees.
- If the timing is to specification, discontinue the Engine Running Self-Test and ignore service code "18".
- If the timing is not to specification, refer to the appropriate diagnostic procedure.