Capri V8-302 5.0L 4V HO (1984)
Fuel Pressure Regulator: Customer Interest
Spark Plugs - Spark Knock
Article No.
84-18-17
SPARK KNOCK - 5.0 HO SPARK PLUGS - 5.0 HO - EROSION PISTONS - 5.0 HO - POSSIBLE DAMAGE
FORD:
1984 MUSTANG, LTD
LINCOLN-MERCURY:
1984 CAPRI, MARQUIS
CALIBRATIONS: All with 5.0 HO C.F.I.
Spark Plug erosion, detonation and sometimes piston damage (from resultant detonation and over-heat conditions) may be alleviated by resetting the fuel
pressure and ignition timing and installing cooler spark plugs.
1.
Allow for engine break-in prior to high speed operation.
2.
Check for kinking of the map sensor vacuum hose (located on left hand strut tower). See article in TSB # 84-13. Kinking of hose can cause map
sensor to function improperly, which could create driveability concerns.
3.
Replace spark plugs (ASF-52) with spark plugs (ASF-42), which are of a cooler heat range.
4.
Check and reset, if necessary, the fuel pressure regulator to nominal setting of 39.3 psi. This will reduce potentially excessive lean condition, in
cylinders no. 1 and 2. (Refer to 1984 Car Shop Manual Section 24-03).
5.
On LTD Police Vehicles Only:
a.
Increase fuel pressure setting 40 KP (5.8 PSI) from as received setting (Step # 4).
b.
Retard engine ignition timing 3~. This can be achieved by installing a 3~ retard octane rod, (part no. E3EE-12A335-BA) according to
procedure outlined in the 1984 Car Shop Manual (Section 23).
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
E3FZ-12A335-B
3~ Retard Octane Rod
B
ASF-42
Spark Plug
A
OTHER APPLICABLE ARTICLES: 84-13
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP12335A84
TIME: 0.8 Hr.
DLR. CODING:
Basic Part No.
Code:
DRIVE:
H9
