Capri V8-302 5.0L (1982)
Idle Speed: All Technical Service Bulletins
Engine - Spark Knock/Detonation
Article No:
81-25-15
12/15/81
Subject:
Engine Detonation with 2150 2V Carburetor
FORD
1982 - Ford, Granada, Mustang, Fairmont, T-bird With 4.2L And 5.0L Engines (except California)
Calibrations: All With 2150 - 2V Carburetors
LINCOLN-MERCURY
1982 - Monarch, Capri, XR7, Zephyr With 4.2L And 5.0L Engines (except California)
Calibrations: All With 2150 - 2V Carburetors
WARNING:
This Modification Is Authorized Only For The Listed Engine Calibrations. Performing This Modification On Other Engine Calibrations Is
Unauthorized And Could Create Liability Under Applicable Federal Or Local Laws.
Spark knock and/or detonation in subject vehicles may be corrected by retarding the initial timing as follows:
1.
Check initial ignition timing to be sure it is to the specification on the Vehicle Emission Decal.
2.
Check to be sure all vacuum lines are connected and seated and they are not kinked, cracked or broken.
3.
Vehicles with AOD and dual mode ignition systems. Check operation of ignition timing vacuum switch (12A265) as follows:
a. Check ignition timing with vacuum switch fully connected - both electrically and to the vacuum supply.
b. Recheck ignition timing with the vacuum line removed from the switch. If the timing is not retarded 2-4° the switch is inoperative and must be
replaced.
4.
Check to be sure the EGR valve is functional per Section 29-15 of the Car Shop Manual.
5.
Test vehicle to determine if detonation is eliminated.
6.
Retard the ignition timing in 2° increments to a maximum of 6° from the specification on the Vehicle Emission Decal. Refer to Car Shop Manual,
Section 29-02.
NOTE:
Light detonation during a heavy crowd drive mode is acceptable.
7.
Check idle speeds. Reset as required.
8.
Prepare an Authorized Modifications decal (FPS-8262) and list the date of service, dealer number and modifications performed as shown. Select a
prominent place adjacent to the Vehicle Emission Control Information decal. Clean the area, install the decal and cover it with a clear plastic
shield.
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP-12199-A-82
TIME: 1.0 Hrs.
