F 250 2WD Pickup V8-351 5.8L (1982)
EGR Valve: Customer Interest
EGR Valve - Poor Performance/Fuel Economy
Article No. 83-4-25
POWER LOW/POOR FUEL ECONOMY/ PART THROTTLE RESPONSE - INCOMPATABILITY WITH EXISTING SELF-TEST PROCEDURES -
5.8L(W) ENGINE USED IN 49 STATES
LIGHT TRUCKS 1982/83 F SERIES AND BRONCO
CALIBRATIONS: 1-63T-R12, 1-64T-R12, 2-64Y-R11, 2-63Y-R11, 1-63T-R13, 2-63Y-R12, 1-64T-R13, 2-64Y-R12
On approximately December 15, 1982, the 5.8L(W) EEC engine calibrations used in under 8500 lb. GVW Bronco and F Series Light Trucks were
revised to incorporate a new EGR valve and a new thermactor air control valve (the new thermactor valve is used on the automatic transmission vehicles
only). This engine calibration revision was implemented to improve engine power and fuel economy. The new calibration numbers are: 1-63T-R13,
2-63Y-R12, 1-64T-R13, and 2-64Y-R12. A 49 State vehicle built prior to this calibration revision may be updated to the new level EGR/air control
valve. The calibrations that are eligible for the revision are: 1-63T-R12, 1-64T-R12, 2-63Y-R11, and 2-64Y-R11.
The new revised automatic transmission production calibration, and any automatic transmission vehicle updated will require a new self-test procedure be
used when diagnosing the EEC system.
Listed below are procedures for updating a vehicle with the power/fuel economy concern followed by a new self-test procedure to be used on these
revised calibrations:
Procedure for revising calibrations with customer concerns.
1.
Verify the vehicle is of the above applicable engine calibration level.
Calibrations:
1-63T-R12, 2-63Y-R11 - Manual Transmission 3.54/3.55/3.50 Axle Ratio Only
A.
Remove and discard EGR valve (E0AE-9F483-AA) and replace with EGR valve (E0AZ-9F483-C). Refer to pertinent Truck Shop Manual for
torque specification.
B.
Locate engine code tag and with a Sharpie Pen, advance the calibration levels from R11 to R12 and R12 to R13 consecutively.
Calibrations:
1-64T-R12, 2-64Y-R11 - Automatic Transmission 3.55/3.54/3.50 Axle Ratio Only
A.
Remove and discard EGR valve (E0AE-9F483-AA) and replace with EGR valve (E0AZ-9F483-C). Refer to pertinent Truck Shop Manual for
torque specifications.
B.
Remove and discard thermactor air control valve (D8EE-9F491-AA) and replace with control valve (E3AZ-9F491-A). Be sure to orient valve in
same position as original.
C.
Locate engine code tag and with a Sharpie Pen, advance the calibration levels from R11 to R12 and R12 to R13.
NOTE:
Ensure that all hoses are secure and there are no air, vacuum or exhaust leaks.
