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Old 01-06-2014, 03:36 PM
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Default Ground Loop Isolators/Engine Whine thread

Ive had engine whine with practically every setup Ive had excluding the times when I ran the speakers just off the headunit power.

Now, Ive found that installing a Ground Loop Isolator on my sub amp solves the issue. I have literally tried almost every trick Ive ever read about trying to get rid of the noise, and nothing has worked except for the GLI.

The purpose of this thread was to
1) Ask what the best GLI on the market
2) Id like to have a list made of all the common problems & solutions to having engine whine/ground loop problems and for this to be stickied. Id appreciate any and all feedback you guys can contribute to this.
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it makes since that if u add an alternator it will add resistants make your MPG go down but i dont see how turning up your volume adds more resistants.
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Old 01-06-2014, 03:41 PM
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thread stickied. hope it's worth it.

I think in the end, your ground loop may exist between the two voltages you run and the only solution I know of is a GLI.

an Audio control LC1 can act as a GLI but it would need to run on the 16v side to do what you need.
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Old 01-06-2014, 03:44 PM
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Thanks. Im on ebay right now looking for a new GLI. I'll check out the LC1
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it makes since that if u add an alternator it will add resistants make your MPG go down but i dont see how turning up your volume adds more resistants.
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Old 01-06-2014, 03:57 PM
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man i had this same issue in the caddy. and was only running 12v. drove me fricking nuts. never found the problem either. 100's of hours tearing crap apart but nothing. id be interested to see if you ever find the prob to know what it is. i still lose sleep over it
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Old 01-06-2014, 04:04 PM
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One of the only things I havent tried is getting rid of the Mechman 270 that runs the 12v side of the truck. Now that I think of it its the only common denominator that could cause the issue, as I had engine whine problems with multiple mids/highs amps even before the 16v side was added.
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it makes since that if u add an alternator it will add resistants make your MPG go down but i dont see how turning up your volume adds more resistants.
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Old 01-06-2014, 04:39 PM
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i have heard of alts being the prob. not usually the case though, but possible
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Old 01-06-2014, 05:58 PM
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After a few minutes of research Im leaning towards the Jensen Iso-Max Ci-2RR
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it makes since that if u add an alternator it will add resistants make your MPG go down but i dont see how turning up your volume adds more resistants.
SENSE RESISTANCE

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Perhaps a mod could change it to "Massivespfail"?
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Old 01-07-2014, 11:40 AM
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So since it seems like nobody wants to contribute, I'll start with a list of things to try to get rid of engine whine.

First, and probably most common, is GROUNDS. Check all grounds for good connections. Always have the most solid and direct ground connection possible.

Second, check your RCA's! Some RCA's have screwed on connectors that can come loose and cause problems. Also, make sure your wires arent getting pinched bad anywhere. Also, its a good idea to route RCA's away from power/ground wires. Anything that could cause interference to pick up. It would also make sense to use a good quality RCA, but I cant back that up because Ive had good luck with "cheap" RCA's and have had some bad luck with more costly "brand name" RCA's.

Third. Check your equipment! I had a side plate come loose on an amp one time (probably from vibration) and it was contacting the RCA terminals of the amp and caused all sorts of noises. I thought I blew the amp up! Found and tightened all screws and problem went away.

Fourth. ----FEEL FREE TO CONTRIBUTE PLEASE!!----

KEEP THIS GOING!!! ITS STICKIED!
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it makes since that if u add an alternator it will add resistants make your MPG go down but i dont see how turning up your volume adds more resistants.
SENSE RESISTANCE

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Perhaps a mod could change it to "Massivespfail"?
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Old 01-07-2014, 11:49 AM
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i had a hu with the dongle style rcas and the grounding to those isn't as good for some reason so i had to wrap wird around the casing to rcas and then ground back to hu cage. that fixed the problem on one of my installs.
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Old 01-07-2014, 12:13 PM
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Maybe the pico fuse is fried in the HU I wasted 2 head units because I had a bad RCA cable F me again!
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