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  #1  
Old 04-22-2010, 05:43 PM
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idle noise with spartan

Anybody notice funny sounds when the truck is in park and ideling? I was hooking up a trailer today and noticed the exhaust changes tones alot and when you sit in the truck it revs slighty every 20 seconds or so. Running spartan 250 tune with cat/dpf delete with stock exhaust. Just trying to find out if this is normal
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Old 04-22-2010, 05:53 PM
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i think the 250 has the egr still enabled...if it does then the sound you are hearing is the egr valve opening and closing...put one of the signals on your dashdaq to commanded egr under ford specific...and watch to see if the numbers on the gauge cordinate with the change in exhaust tone you are hearing(will go from 0% to around 33%)
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Old 04-22-2010, 06:03 PM
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ok dont really know much about the signals under ford specific hahaha. I guess i need to get more familar with the dashdaq
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Old 04-22-2010, 06:37 PM
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Quote:
Originally Posted by amb82 View Post
ok dont really know much about the signals under ford specific hahaha. I guess i need to get more familar with the dashdaq
im almost positive its your egr valve opening and closing...does it go from a hissing sound to a deeper tone and back again?
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Old 04-22-2010, 06:55 PM
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yeah thats the sound. I also hear the hissing sound when iam going slow around 5 mph alot. Is that normal?
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Old 04-22-2010, 06:58 PM
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yes, normal
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Old 04-22-2010, 07:01 PM
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So is the egr valve part of the little rev that happens about every 20 seconds or so while in park.
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Old 04-22-2010, 08:14 PM
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yup that is your egr valve opening and closing...totally normal
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Old 04-22-2010, 08:22 PM
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Thanks for clearing that up for me.
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