Truck has issue with fluctuating idle

Tiny
JACOB844
  • MEMBER
  • 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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Saturday, November 17th, 2012 AT 12:51 PM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
What motor and what have you done?

Roy
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Sunday, November 18th, 2012 AT 4:40 AM

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