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Home >> Cadillac >> 1988 >> Cimarron Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Multi-Port >> Trouble Shooting >> Symptoms >> Detonation

Trouble Shooting: Symptoms: Detonation

  1. Check for overheating problem. Check ignition timing. Check EGR operation. Check transmission Torque Converter Clutch (TCC) and Electronic Spark Control (ESC) operation. Check for improper fuel octane rating.
  2. Check fuel pressure. See appropriate A-7 FUEL SYSTEM DIAGNOSIS CHART in COMPUTERIZED ENGINE CONTROL section. Check PROM or MEM-CAL for proper application. Check P/N switch input to ECM (if equipped).
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