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Why does it idle up but will not idle down.

Tiny
TGANN
  • MEMBER
  • 2005 DODGE RAM
  • 15,000 MILES
05 dodge 3500 5.9 diesel idle up but won't idle down. The only way it will idle down is to turn off engine and restart. Installed new injectors but didn't help.
Friday, September 23rd, 2011 AT 1:17 AM

4 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Have you tried to check for trouble codes?
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Friday, September 23rd, 2011 AT 12:54 PM
Tiny
TGANN
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  • 3 POSTS
I have checked it does not show any codes
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Saturday, September 24th, 2011 AT 1:29 AM
Tiny
TGANN
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I have checked it does not show any trouble codes
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Saturday, September 24th, 2011 AT 1:30 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Since turning engine off and restarting changes the idling speed, it should be a control problem and without any trouble codes, you would need to plug in a scan tool to monitor the various sensors and check if they are working within specifications.
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Saturday, September 24th, 2011 AT 11:54 AM

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