Low Stall Speeds (Stall in Ranges 1-6)

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Condition	Action
Engine not performing efficiently Plugged or restricted injectors High altitude conditions Dirty air filters Incorrect fuel/valve timing Throttle linkage broken or not adjusted correctly Electronic engine controls condition	Refer to the appropriate Engine Mechanical or Engine Controls & Fuel article. The following specific sections should be helpful in defining the condition: Refer to Diagnostic System Check - Vehicle . Refer to Symptoms - Engine Mechanical .
Stall speeds of 33% of normal implies freewheeling stator	Replace the converter assembly. Refer to Torque Converter Replacement .
Engine smoke controls	Compare lugback vs. static stall speed.
Incorrect torque converter	Install the correct torque converter. Refer to Torque Converter Replacement .