Mark VI V8-302 5.0L (1982)
Engine Control Module: All Technical Service Bulletins
Engine - Surge Cruising or on Deceleration
Article No. 83-7-15
SURGE - STABILIZED DRIVE AND/OR DECELERATION - EEC III WITH CFI
LINCOLN-MERCURY 1982 LINCOLN/MARK VI
To determine cause of engine surge at 30-55 mph and/or deceleration, check rotor alignment, check P.V.S. valve, install rubber EGR vacuum hose,
check air conditioner charge, install new processor.
1.
Verify rotor alignment of the EEC distributor.
A.
Remove the distributor cap and wires and position them to one side.
B.
Remove the rotor.
C.
Rotate the engine until the No. 1 piston is on the compression stroke.
NOTE:
Verification of being on the compression stroke is essential to correct rotor alignment . If the piston is on the exhaust stroke, the rotor
can be misaligned by 180~.
D.
Slowly rotate the engine until the alignment tool T79P-12200-A can be installed between the slot on the sleeve and the cut-out (slot) on the
distributor cap adapter.
E.
Read the timing mark on the damper indicated by the timing pointer.
F.
If the timing mark is 5~ ATDC +/- 4~, the rotor alignment is correct. If not, set to specification.
G.
Reinstall rotor, distributor cap and wires making sure wires are firmly seated in the distributor cap terminal housings and on the spark plugs.
2.
Verify that PCV Valve D8ZE-6B890-AB (Red - Motorcraft No. EV-98) is installed and functioning.
A.
Disconnect the valve and shake it. The valve should rattle. If it does, reconnect the valve.
B.
If the valve does not rattle, replace and recheck original concern. If still present proceed to next step, Step 3.
3.
Replace the existing nylon vacuum tubing (yellow) that runs from the EGR Vacuum Solenoid Valve (E0AB- 9D474-CA) to the Fuel Charging
Assembly.
A.
Remove the existing tube. The existing tube consists of a 235 mm length, elbow, a 240 mm length, elbow and a length of 210 mm which connects
to the fuel charging assembly.
B.
Using bulk 5/32" rubber tubing, fabricate and install a new hose as follows:
1.
Starting at the EGR Vacuum Solenoid valve, and following the original tube routing, connect a 21" (525 mm) length of hose.
2.
To this hose, connect a 3/16" x 3/16" elbow (Part Number 387065-S).
3.
To the elbow, connect a 10" (250 mm) length of hose and route it to the Fuel Charging Assembly.
4.
Secure the new hose to the existing vacuum harness with bundling straps 95873-S.
4.
Before proceeding further, road test the vehicle by bringing engine to normal operating temperature and determining if the original concern is
still present with or without the air conditioning operating. If the concern has been resolved, do not proceed any further and return vehicle to
customer.
A.
If surge exists without A/C running, proceed to Step 5.
B.
If the surge condition still exists with the air conditioner operating only, refer to Section 36-32, Volume A, 1982 Car Shop Manual,
Body-ChassisElectrical. This section is the "A/C General Service
-
Refrigerant Systems."
C.
Verify that the air conditioning is properly charged. If not, charge the system according to the procedures in Section 36-32-12. (Improper charge of
the A/C coolant will cause frequent cycling of the A/C compressor causing surge.)
5.
If, after performing Steps 1, 2, 3 and 4, the concern is still there, without the A/C running, perform the EEC Diagnostics as described in Sections 3
and 5 of Volume G, Book II, "1982 Car/Truck Shop Manual, Engine/Emission Diagnostics." If the system checks out satisfactorily, replace the
Electronic Control Assembly E2VF-12A650-A2A with E2VF-12A650-A2B.
PART NUMBER
PART NAME
CLASS
D9ZZ-6A666-A
P.C.V. Valve
A
387065-S
Elbow
BS
95874-S
Bundling Strap
AG
D0PZ-12226-B
5/31 Bulk Hose 31" Required AG
