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Old Sep 29, 2021 | 06:32 PM
  #1  
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Fmc128
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Idle

Hey guys, so I have been wanted to add the high idle switch but something weird happened this morning. I was idling at the bus stop, temp was showing but not a lot. The truck then idled up to exactly 1000rpm and held. I let it go for about 5 minutes, tapped the gas and idled back down as I pulled away. No codes and truck ran normal. Any thoughts?
 
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Old Sep 29, 2021 | 06:35 PM
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Rich53
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They all do that. But I don’t know why. My guess is cooling the A/C condenser, but it is really a pain if it parked in the driveway, gets really loud
 
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Old Sep 29, 2021 | 06:39 PM
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Fmc128
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Originally Posted by Rich53
They all do that. But I don’t know why. My guess is cooling the A/C condenser, but it is really a pain if it parked in the driveway, gets really loud
Gotcha, makes sense then our SUV does that but never noticed in my truck. Thanks
 
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