Excelon engine whine

[explorer2 10+ year member]

This one is stumping me, I had a noticeable engine whine when using the factory ground, replaced it with a ground at the same point as the amp and it went away, but would come and go very slightly every once in a while. Didnt bother me because it was not even noticable at listening volume. Fast forward to today, I left my lights on and all day and had to get jumped. After I get the truck started I have a very bad engine whine, all of my wiring looks good. I eliminated the amp by disconnecting the rcas, so it is definitely the deck (x889). What is wrong?

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[azimuth 5,000+ posts]

This one is stumping me, I had a noticeable engine whine when using the factory ground, replaced it with a ground at the same point as the amp and it went away, but would come and go very slightly every once in a while. Didnt bother me because it was not even noticable at listening volume. Fast forward to today, I left my lights on and all day and had to get jumped. After I get the truck started I have a very bad engine whine, all of my wiring looks good. I eliminated the amp by disconnecting the rcas, so it is definitely the deck (x889). What is wrong?

this happened to me after someone stomped my distro. block. you may need new ground wires all together. that's what i did and problem solved. the sub amp filters out engine whine with the lp filter, but the amp for highs won't. switching out all ground wires worked for me though, including the decks ground.

 

[explorer2 10+ year member]

I dont have a sub in this truck, just an arc amp for the fronts and rears. I am going to put a new ground for the deck in tomorrow. I hope that jump starting it didnt damge the headunit at all. And it is much worse than ever before, very noticeable at idle and almost unbearable (for me) at high rpms.

 

[Louisiana_CRX 5,000+ posts]

Yeah it sounds like a ground loop...

 

[Frankensuby 10+ year member]

Some ideas:

Blown pre-outs. I recently did this to my 6800MP deck. Got it warrantied, fixed it right away. it was caused by the ground for my amp falling out with power on.

Bad ground point. Come and go sounds like a loose wire somewhere. Try cleaning and regrounding all your system wires. After the jumpstart, try replacing any small gauge grounds (i.e. 18 AWG grounds)

Thats about it. It definitely sounds like some ground loop. Good luck, my first bout with ground loop led me to Isolators. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif