LTD Wagon V8-302 5.0L VIN M 4-bbl HP (1984)
1.
Perform EEC IV Quick Test, by referring to 1984 Emission Diagnosis Shop Manual, to assure that no other faults are present.
2.
Determine that the MAP sensor (located on right hand inner fender) has a yellow dot on the top of sensor; if not, replace with a yellow dot
MAP sensor part number E43Z-9F479-B only.
3.
If spark knock is evident only in third gear at speeds of 17-20 mph and/or fourth gear at speeds of 35-40 mph, then verify that the throttle
valve (TV) pressure is set to the nominal specification (35 PSI). Refer to the adjustment procedure in the 1984 Car Shop Manual (Page
17-20-6).
4.
If detonation is still present, refer to procedure in TSB 84-13-8 which pertains to engine octane adjustment.
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