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Cruise control fluctuating

Tiny
SMART ART
  • MEMBER
  • 2003 DODGE RAM
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 82,000 MILES
After setting cruise at any speed it Will accelerate and decelerate about 50 to 100 rpm's constantly which is about three to five mph. Vit will make you sick.
Does not down or upshot just the three to five mph change.
Saturday, December 31st, 2016 AT 7:15 AM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
You need a scanner to see what the Engine Computer is doing or responding to. That will show if any of the valves in the servo are operating to cause the fluctuations. The two most common causes of surging are a vacuum leak and excessive free-play in the servo cable.
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Saturday, December 31st, 2016 AT 12:50 PM

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