EEC IV EGR Pinpoint Test - Manual Correction

90ford27
^ ENGINE/EMISSIONS DIAGNOSIS SHOP MANUAL- 1988-PAGE 19-259-SYSTEM CHECK PINPOINT TEST S-EGR VACUUM CHECK REVISED

^ ENGINE/EMISSIONS DIAGNOSIS SHOP MANUAL- 1989-PAGE 17-349-SYSTEM CHECK PINPOINT TEST S-EGR VACUUM CHECK REVISED

^ ENGINE/EMISSIONS DIAGNOSIS SHOP MANUAL- 1990-PAGE 17-396-SYSTEM CHECK PINPOINT TEST S-EGR VACUUM CHECK REVISED
Article No. 90-18B-3
FORD: 1988-90 CROWN VICTORIA, ESCORT, MUSTANG, TAURUS, TEMPO, THUNDERBIRD

LINCOLN-MERCURY: 1988-90 CONTINENTAL, COUGAR, GRAND MARQUIS, MARK VII, SABLE, TOPAZ, TOWN CAR

LIGHT TRUCK: 1988-90 BRONCO II, BRONCO, ECONOLINE, F-150, F-250, F-350, RANGER
ISSUE: An incorrect vacuum check procedure in the System Check Pinpoint Test S in the Engine/Emissions Diagnostic Shop Manual can lead to EGR system misdiagnosis.

ACTION: Refer to the pages following this TSB article for the revised test procedure.






Revised Test Procedures For 1988






Revised Test Procedures For 1989






Revised Test Procedures For 1990
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 490000