Tempo L4-122 2.0L DSL (1984)
Idle Speed: By Symptom
Technical Service Bulletin # 84107
Date: 840508
Engine - Booming Noise At Idle
Article No. 84-10-7
IDLE BOOM 2.0L DIESEL
FORD 1984 TEMPO - ESCORT
LINCOLN-MERCURY 1984 TOPAZ - LYNX
Idle boom may be alleviated by increasing the idle speed up to 825 RPM.
Idle boom is a cycling rhythmic noise often accompanied by a sensation of pressure on the ear drums (Shop Manual Volume B, Page 18-01-2). It may be
alleviated by increasing the idle RPM up to 50 RPM until the boom level is decreased. The idle specification which was 725-775, can now be increased
to 725-825 RPM.
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 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: None
WARRANTY STATUS: "INFORMATION ONLY"
Technical Service Bulletin # 84107
Date: 840508
Engine - Booming Noise At Idle
Article No. 84-10-7
IDLE BOOM 2.0L DIESEL
FORD 1984 TEMPO - ESCORT
LINCOLN-MERCURY 1984 TOPAZ - LYNX
Idle boom may be alleviated by increasing the idle speed up to 825 RPM.
Idle boom is a cycling rhythmic noise often accompanied by a sensation of pressure on the ear drums (Shop Manual Volume B, Page 18-01-2). It may be
alleviated by increasing the idle RPM up to 50 RPM until the boom level is decreased. The idle specification which was 725-775, can now be increased
to 725-825 RPM.
