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Discussion Starter · #1 ·
I noticed after driving my truck hard one weekend that it now idles slightly higher at about 800 RPMs and it’s got an odd louder noise when idling that increases as I rev the engine. Definitely an added noise on top of the normal engine noise. It’s not really a ticking noise but more of a lower tone whirl or growl. The AC is off and the engine is warmed up.

Speedometer Vehicle Car Gauge Motor vehicle


Any ideas on what could be causing it? There are no Check Engine lights on.
 

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Discussion Starter · #9 ·
I ended up taking the truck in to a local shop today as we have a road trip coming up and didn't want to take any chances. Upon initial inspection, they believe it's one of the pulleys, but will need to put a stethoscope on them to find out which one. I'll let you know what they find it to be.
 
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