Noise only when Engine is running (Buzzing sound - increase with gain boost)

SouthArk370Z · 12-25-2019, 09:36 AM

Quote:

Originally Posted by RonRizz

If the "noise" is actually slight ripples in voltage, it will smooth them to a certain degree, but this is not "Audible noise".
I have not seen a single article that states that a stiffening cap will help reduce noise. Not even from a manufacturer trying to sell them.
I would think that if it were in fact a benefit of using a capacitor, every manufacturer would shout it from the rooftops to try to sell one more unit.

As I said, power caps are not installed for noise filtering. A filtering cap should be be installed as close to the equipment as possible - all power caps I've seen are installed in the engine compartment. But it still provides some filtering.

Most manufacturers already have quite a bit of noise suppression designed into their products (on power and audio). They know the units will be operating in an electrically noisy environment. If you need to add caps for noise, you have a problem elsewhere (eg, speaker wires run too close to the ECM, faulty voltage regulator, etc).

Quote:

Originally Posted by RonRizz

In my opinion, Stiffening caps are snake oil, and if your sound system is ridiculous enough that you need additional help, a second battery, or upgraded alternator may be in order.

On this, we agree.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Top Buzzing Sound	fins	Nissan 370Z Roadster (Convertible)	5	11-02-2016 03:52 AM
Interior Buzzing Noise	Gerg	Exterior & Interior	10	04-29-2016 06:20 AM
Metal Buzzing Sound When Skipping to 6th	Bad Boy	Engine & Drivetrain	14	03-16-2015 06:32 PM
high pitched noise (like mosqito sound) from engine	kjz	Engine & Drivetrain	25	09-06-2014 04:50 PM
Tsb: 2007-2009 nissan z; tapping noise from dash area when engine is running	AK370Z	370Z Technical Service Bulletins (TSB) / Recalls	0	02-08-2010 09:59 PM