grounding problem, need help

[unrated 10+ year member]

ok guys i have a 98 chevy cavalier z24, im running a Pioneer DEH-7800, 2 12" Type Rs, being powered by a Hifonics BXI-2006D, and alpine 5 1/4 and 6x9 powered off a Hifonics Zesus 4 chan amp, since i hooked up that 4 chan ive had a whinning noise through the interior speakers only , and nothing through the sub amp, both amps are grounded to the same spot. so i re-wired my RCAs down the other side of the car away from the power, i made a new ground on the HU, and i still had the same prob, so i order up a set of shelded cables from Knu, and just installed them, turned everything on, and perfect all was good, so i started to push the cd player back into the sleeve, and i got the static back, so i think ive found the prob, the HU is grounding out on the sleeve and the noise goes away, but only in certan spots it does it, so what do i try, do i ground the sleeve, run a wire from the sleeve to a grounding spot, or should i try grounding the deck from the exterior (on the outside of the deck to a new grounding spot)

Thanks Guys

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[GearGuy2001 10+ year member]

Check Here, http://www.caraudio.com/forum/showthread.php?t=198477

Try Grounding the RCAs to the chassis of the HU

 

[unrated 10+ year member]

Check Here, http://www.caraudio.com/forum/showthread.php?t=198477
Try Grounding the RCAs to the chassis of the HU

wont work i dont have the same setup, my rcas come out of the unit, my question is should i ground the exterior of the deck, or is that bad?