RPM Fluctuation
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I am new to the group, thought I posted this the other day but now I cannot find it. 1983 928S has RPM fluctuation when decelerating between 1400 and 1600 RPM engine revs/slows on its own. DOes not happen when accelerating through that range only on deceleration, stops at 1200RPM. Thinking it is a vacumn leak. Any other ideas or suggestions where to look.
1983 928S Auto 105K
1983 928S Auto 105K