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Old 05-25-2022, 09:32 AM #1
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Location: Clear Lake, TX
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Acceleration Whistle - 2001 4WD SR5

Just noticed this morning when accelerating a faint whistle every time I push the accelerator. Windows closed and can hear it in the truck. Trying to relate to RPMs, it always seems to be in the 2K+ range, but this is the engine speed any time I press on the accelerator. The moment I let up in the slightest the sound goes away. Thoughts?

I had the valve cover gaskets and throttle body cleaning done weeks ago. Truck has run fine since then. That is the last maintenance performed. Thinking when I get home from work I'll open hood and see if I can hear it when revving the engine. I thought about a video but I seriously doubt anyone will hear it in the video over the "groan" of the engine.
Thanks.
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James
2001 4Runner SR5 4WD - 231 mm TBU, B&M 70264 external transmission cooler, Magnefine external transmission filter
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