Mechanics

GMC SIERRA REBUILD PROBLEM

1987 GMC Sierra • 188,000 miles

Truck has issue with fluctuating idle. Standard shift (4 spd Muncy). I have replaced and or rebuild all the components attached to the manifold including all plastic vacuum lines. What is the cause of the fluctuating idle?
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Jacob844
November 17, 2012.



What motor and what have you done?

Roy

ASEMaster6371
Nov 18, 2012.