Firenza L4-121 2.0L (1983)
SET TIMING DIAGRAM
Spark Knock Heavy Loads. Loss of
Check and note timing. Disconnect "Set
Performance and Fuel Economy.
Timing" connector and again note timing.
See illustration for "Set Timing" connector location. If no change check:
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Open or short to ground in bypass CKT 424. See Code 42
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Relay contacts stuck closed
