I have a 98 Ranger 4.0 L with 130,000 miles. Ijuststartedgetting a squeek/rub type sound From the back top center area near a sensor of my intake while the vehicle is at idol,but when you give it gas it goes away. It almost sounds like a belt slipping type noise or a rubbing. The vehicle is running fine. Any ideas on what this could be or where to start looking..
THANKS

 

Could be clutch fan , .

 

It's the cam synchronizer..

The sychronizer shaft andhousing can run dry and cause a squeal, or squeak more often noticed at lower RPM's.. Like nails on a chalk board.. The sychronizer is 'clocked' and timed, and by the book requires a holding tool to replace.. You can 'carefully' scribe and mark the synchronizer housing to block position/location,then, theshafts rotationalposition (clocked angle/position) in relation to the upper housing/sensor..