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Discussion Starter #1
is this noise my vanes opening and closing? or is it something else?
i just heard it on wednesday now it happens when i turn on the truck when it is cold. it sounds like a lope to me

 

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I deffintaly think it sounds more like a lope than vein opening and closing. Mine will rumble then hiss but deffintaly does not lope like that.
 

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I dont have any volume here at the store but if it lopeing it could be your FPR going bad. ive had to change 2 on my truck so far
 

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doesnt it cause more smoke tho if it is fpr??
idk mine loped like a mofo when i first started it up and whenever it was cold outside it would do it even worse. does the truck kinda want to go on its own when you let off the brake or does it pull thur the brakes when it starts doing it??
 

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Discussion Starter #7 (Edited)
i dont think its doing anything with brake system yet atleast i havent seen it. it lasts for like 30 seconds then goes away. it only does it when i first start it up
 

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beats me :confused: if it gets worse then its the FPR for sure.
 

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when i get home ill listen to it. ill post a vid my how mine sounds if nobody figures out what wrong before i get home
 

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mine started this recently as well.
 

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Discussion Starter #11
thanks cameron!

jared does it only do it at idle at start up?
 

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Discussion Starter #13
thats what chase told me to. and i dont think my RPM's are changing
but i had to ask for others
i was hoping u would post on here
 

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It deffintaly doesnt sound like what my truck does at all but I have a lmm so i'm sure its different.
 

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Can you monitor vane pos when it does it.
 

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kyle did you load that new tune i gave you? i changed your idle just a little could be why it sounds different
he didnt feel like pulling the head unit out today :rof
 
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