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Home >> GMC >> 1997 >> Forward Control 6.5 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Engine Controls - Specifications - 7.4L) >> Fuel System >> Minimum Idle Speed
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Minimum Idle Speed

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 1995 GMC Vandura Special, 1995 GMC Vandura, 1995 GMC Suburban, 1995 GMC Rally Camper Special, and 1995 GMC Rally. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Minimum idle speed adjustment can only be performed on 7.4L engines. For minimum idle speed adjustment procedures, see ADJUSTMENTS article.
MINIMUM IDLE SPEED

Application (1) RPM
Automatic Trans. (2) 600-650
Manual Trans. (3) 675-725
(1) Idle speed with seated IAC is lower than specified if engine has less than 500 miles or when checked at altitudes above 1500 feet.
(2) Automatic transmission in Drive.
(3) Manual transmission in Neutral.
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