Ignition Timing - Engine Spark Knock

Models


1983-1984 Trucks Equipped With 3.7L IBBL Engine & Federal Emission Package


Subject


Spark Knock


Index


DRIVEABILITY


Date June 17,1985


No.


18-26-85

P-2072-C
SYMPTOM/CONDITION

Vehicle may exhibit spark knock on light acceleration or a steady cruise.

PARTS REQUIRED

1 Authorized Modification Label PN 4275086

REPAIR PROCEDURE

Retard basic timing 4~ to the following:

Manual Transmission From 12~ BTDC to 8~ BTDC

Automatic Transmission From 16~ BTDC to 12~ BTDC

FIGURE 1:

Type Authorized Modification Label, PN 4275086, as shown in Figure 1..

POLICY: Reimbursable within the provisions of the warranty

TIME ALLOWANCE:
Labor Operation No. 08-15-01-92 . . . . . . . . . . B - 0.3 Hrs.
.......... ADXW-0.2Hrs.

FAILURE CODE: AM - Authorized Modification