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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls - Tests W/O Codes - 4.0L) >> Symptoms >> Spark Knock >> Preliminary Checks

Preliminary Checks

WARNING: This page is about a different variant/trim than selected.

Check vacuum hose routing. Check for restricted air intake system. Check engine oil and fuel quality.

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