Rear endish noise

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Lift_to_suceed

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2018 SCAB with 2700km been stretching its legs off road pretty good recently and having a blast. Now when I start it up it sounds like the fuel pump is going mad, put my hand on the tank and couldnt feel any vibration. Or maybe its vacuum noise of some sort? Only in park and below 20km it happens, drive off and the noise stops. Only comes up after startup. Any clues from anyone? Truck is sitting at 1/2 tank currently, I will try and get sound of it tomorrow and post it in here.

Thanks!

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Sozzy12

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IAC valve? They are known to make a humming noise at idle when they get gummed up some. Not sure if these motors use the same system as years past. Sometimes you just need to clean out the valve with some brake cleaner.
 
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Lift_to_suceed

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IAC valve? They are known to make a humming noise at idle when they get gummed up some. Not sure if these motors use the same system as years past. Sometimes you just need to clean out the valve with some brake cleaner.
If it does have the same it would make sense, was in some gummy mud. Ill do some digging, thanks!

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