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Discussion Starter · #1 ·
When I first start my '07 Tundra w/ 5.7L engine, for about 15-20 seconds there is a decidely high pitch, motor sound coming from (I think) the passenger side of the engine compartment. It actuallys sounds kind of neat and high tech, but I don't know what it is. I only hear it on startup as well. You can hear the motor wind down as it shuts off too. I doesn't sound like a fuel pump either. Could it be part of that fancy Toyota "Acoustically tuned" air intake? Any ideas?
K
 
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