LEMON Manuals
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Ford
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1998
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Econoline E150, 4.2 2
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls Tests W/O Codes - Gasoline
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Symptoms
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Backfires
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Preliminary Checks
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Preliminary Checks
Check vacuum hose routing. Check spark plug wiring (if equipped) for incorrect firing order.