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Home >> GMC >> 1998 >> Forward Control 7.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures - 7.4L >> Idle Speed & Ignition Timing

Idle Speed & Ignition Timing

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Ensure idle speed and ignition timing are set to specifications. For specifications, see SPECIFICATIONS - 7.4L article. For adjustment procedures, see ADJUSTMENTS - 7.4L article.

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