Buzzing Type Noise From Upper Engine Area on Ford Ranger

A buzzing type noise may be noted from upper engine area at about 1900 RPM, under light acceleration. Our technicians tell us this can be caused by loose ignition coil bracket bolts. Coil bracket bolts should be checked for the correct torque before further diagnoses is performed.

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Average mileage: 101,754 (30,000–199,000)
Engines affected: 2.3L 4 Cylinder, 3.0L V6, 4.0L V6
11 model years affected: 1997, 2001, 2002, 2003, more2004, 2005, 2006, 2007, 2008, 2009, 2010
16 people reported this problem
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Viewing 1 - 4 of 4 problem details
1997 Ford Ranger - 4.0L V6 120,263 mi,
It makes a weird buzzing sound when motor is hot
1997 Ford Ranger - 4.0L V6 120,263 mi,
It makes a weird buzzing sound window engine is running Kinda hot
2006 Ford Ranger - 3.0L V6 30,000 mi,
There is a steady , rhythmic clicking noise coming from the rear engine compartment at idle, clearly heard even when radio is on at a low volume. it sounds like small panel or mechanical noise, like an open/close mechanism that runs constantly right behind or underneath the upper front dash. I asked a mechanic about it at a Ford dealership a few years ago and was told it doesn't hurt anything and can't be fixed.
2003 Ford Ranger - 3.0L V6 199,000 mi,
A turbine type sound is heard when accelerating and also I believe even after I have reached speed.