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Search: Posts Made By: old_smokey
Forum: 4.0 SOHC / 4.0 OHV Tech 08-23-2017, 06:39 PM
Replies: 6
Views: 882
Posted By old_smokey
Re: Mystery quiet high pitch whine, VIDEO, '08 Sport

Think it's fixed! I removed the IAC and it was very black. It seemed to open and close ok, but I flushed it with throttle body cleaner and used q tips to clean it out.
...
Forum: 4.0 SOHC / 4.0 OHV Tech 08-23-2017, 06:28 AM
Replies: 6
Views: 882
Posted By old_smokey
Re: Mystery quiet high pitch whine, VIDEO, '08 Sport

The pitch never changes. It doesn't rise and fall with engine speed or anything like that. If I rev it up a little while in neutral, the sound will momentarily disappear entirely, but quickly...
Forum: 4.0 SOHC / 4.0 OHV Tech 08-22-2017, 11:27 AM
Replies: 6
Views: 882
Posted By old_smokey
Re: Mystery quiet high pitch whine, VIDEO, '08 Sport

I've never done that actually... :eek: BUT it's only because I bought the truck two months ago. No way of knowing if the previous owner did either. I'll look into that, thank you for your suggestion,...
Forum: 4.0 SOHC / 4.0 OHV Tech 08-22-2017, 06:06 AM
Replies: 6
Views: 882
Posted By old_smokey
Mystery quiet high pitch whine, VIDEO, '08 Sport

Hi guys,

I have a 2008 Sport 4.0L V6, SOHC. 230,000 KM on it.

Today I noticed a high pitched sound coming from under the hood. It seemed to disappear when I let off the gas. Didn't get louder...
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