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Home >> Pontiac >> 1988 >> Fiero Formula, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Multi-Port >> Trouble Shooting >> Symptoms >> Surges And/Or Chuggle

Surges And/Or Chuggle

  1. Check for loose or leaking air duct between MAF sensor and throttle body. Verify alternator output is between 9 and 16 volts. Repair or replace as necessary.
  2. Check EGR filter condition and EGR operation. Check vacuum hoses for damage or leaks. Check for restricted in-line fuel filter. Check fuel pressure. See appropriate A-7 FUEL SYSTEM DIAGNOSIS CHART in COMPUTERIZED ENGINE CONTROL section.
  3. Inspect O2 sensor for contamination from fuel. Sensor is defective if coated with a White powdery coating. Check ignition timing and spark plug condition.
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