Re: 2000 Corolla new stereo getting engine (alternator?) noise

Thanks again. I didn?t see any prior post asking whether the noise
was from both CD and radio? But...the answer is yes...as well as from
the Aux input. I have a satellite receiver hooked up to the Aux
input. The same noise is present regardless of the input. I?m pretty
sure I?ve troubleshot by disconnecting the speakers one at a time at
some point, with no difference. The speaker wires are routed up
through the tops of the door frames so there is no other wiring
present to be causing interference. The noise is present through all
the speakers. This is the 3rd Amp I?ve had in and the second head
unit, with no change. I?m convinced it?s engine electrical
interference being picked up by the head unit and then amplified
through the speakers. I?m curious...why do you think the ignition
coil wouldn?t fix the problem? It is a "ticking" type of noise, in
time with the engine timing...

"MD99" wrote:
Figured I'd post to see if anyone has any suggestions other
than what I've tried already. Installed a new stereo system
in 2000 corolla. New Pioneer head unit, component blaupunkts
in the front, polk audio speakers in the rear, profile amp
driving the four speakers, another profile amp driving a Dual
subwoofer box with 2 12" subs. Am getting engine noise
(whine, gets louder and faster as engine accelerates). I have
regrounded my amps to the chassis with a very tight connection
and 12 guage ground wire, scraped all paint away to bare metal
- have tried different ground points. Put in new battery with
2 guage ground strap, scraped to bare metal ground point -
head unit is grounded to chassis same as battery point, but
have tried different points. Have upgraded to top-grade
twisted pair, oxygen free 12 gauge speaker wire, rerouted
speaker wire up through top of doors in panels, no other
cabling is near, upgraded signal (RCA) cables to top-grade
rockford-fosgate braided cables for optimum noise rejection,
also routed up through top of door panels away from any other
cabling - power cable to amps runs down through center of car
underneath carpet - have tried running power to amps directly
from an outside battery - no difference, have run power to
head unit directly from battery bypassing wiring through
firewall - no difference. My next step is to replace the
spark plugs and possibly the alternator itself. Any thoughts?
Suggestions? Thanks
.

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