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My subwoofer is making a hissing noise when the truck is running and gets louder as the rpms increase. What could be causing this?

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Engine static. There should be a supressor fitted to your audio system to counter this. it may be faulty. You can install in line ones via the power cable to your system.available from auto parts outlets.

Posted on Mar 05, 2009

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Loud buzzing noise


Is the vibration coming from the heatsink itself or from the fan running at high speed?

I highly doubt the processor itself is vibrating; no moving parts to vibate. A more likely suspect would be one or more of the fan blades having gone out of balance and causing it to resonate at certain RPMs.

What cooler are you using?


Increase Engine Horsepower.

Jun 02, 2012 | KLH ASW10-120 Subwoofer

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Humming noise in the dash area that gets louder as the rpms get faster. what could cause this?


There could be a loose dash bracket causing this or even a loose component on the firewall in the engine compartment. Even silly things like coins in the dash may cause it. Try to get a friend to locate the buzzing as you increase the engine speed. Make sure the car is in park with safety brake on when doing this!
Hope this helps...

Mar 04, 2011 | 2004 Chrysler Sebring

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Ignition timing specs for a 1988 volvo 760 turbo wagon ?


It is most likely going to be between 5 and 15 degrees BTDC. I would put it at 5 degrees BTDC. At idle, if the motor is extremely quiet, but the exhaust loud, move it to 10. As you advance the timing, the motor should become louder and the exhaust quieter (at idle). As you increase RPMs, the motor should get quieter and the exhaust louder. This is only true with an injector pump that has static timing (does not automatically increase with increased RPM).
If your engine has dynamic timing (automatically advances with increased RPM), then I would set the timing at 5 degrees, test run. Maybe change to 7 degrees, test run...etc. Basically, don't make dramatic changes with the injector pump timing if it is dynamic. I hope this helps.

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Alot of road noise from front of car, suspect cv or drive train issue , As speed increases noise gets louder. Engine runs smooth, new tires 6mos. ago, alignment good.


MOST LIKELY CAUSE OF THIS IS THE WHEEL BEARING, DEFECTIVE CV JOINTS ONLY MAKE NOISE IN TURNS AND THAT IS A CLICKING NOISE,.

Mar 16, 2010 | 2004 Nissan Sentra

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