Bronco II 2WD V6-177 2.9L (1986)
Engine Control Module: Customer Interest
Engine - Rough Idle/Black Smoke
Article No. 86-6-32
IDLE - ROUGH - BLACK SMOKE (2.9L) - MANUAL TRANSMISSION
LIGHT TRUCK 1986 RANGER, BRONCO II
Some of the subject vehicles may exhibit a rich fuel mixture condition. As a result, the customer may be concerned about a rough idle and/or black
smoke (emitting from tailpipe) condition.
To correct the condition, the following procedure is recommended.
1.
Using Rotunda EEC IV Monitor 007-00018 or Super Star Tester 007-00019, perform EEC IV Self-Test. Verify and service all codes as directed
by the 1986 Engine/Emission Diagnosis Shop Manual, Volume H.
2.
If after performing Step 1 and service code 42 remains during key-on engine running, proceed to Step 3.
3.
During self-test, if code 42 occurs (key-on engine running) verify EEC processor module part number.
4.
If vehicle is equipped with one of the modules with part number E6TF-12A650-CB, E6TF-12A650-LA or E6TF-12A650-MA, replace with
corresponding modules on the following application chart.
DELETE
ADD
EEC Processsor Module
EEC Processor Module
Applications
E6TF-12A650-CB
E6TZ-12A650-CC 49S Ranger/Bronco II M/T
E6TF-12A650-LA
E6TZ-12A650-LB 49S Chassis Cab M/T
E6TF-12A650-MA
E6TZ-12A650-MC Calif. Ranger/Bronco II
Chassis Cab M/T
NOTE:
If the vehicle is equipped with any of the EEC processor modules listed in the "ADD" column, DO NOT CHANGE due to warranty
implications.
5.
With a Sharpie No. 49 pen, update the engine calibration number from R00 level to R10 level.
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.
PART NUMBER
PART NAME
CLASS
E6TZ-12A650-CC
EEC Processor Module
R
E6TZ-12A650-LB
EEC Processor Module
R
E6TZ-12A650-MC
EEC Processor Module
R
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: 12650D - Verify concern.
TIME:
0.5 Hr.
OPERATION: 12650D6 - Replace processor.