huh?do-what? Posted March 24, 2010 Report Share Posted March 24, 2010 95 civic. I have horrible engine noise with or without ground loop isolator. Worse without isolator. Tried groundg rca shield to radio, chassis, battery. Tried power line noise filter. I get interference with car ignition switch on, but without motor running. If i turn blinkers or hazards on, I hear it through the speakers. If i crank car it is much worse, almost like 2 different noise sources. Unplug rcas from head unit noise is still present. If i insert a mute plug in rca, the noise is gone. This is with three different amps, new and used. When i grounded the rca shield to the radio, it gets worse. Part of the noise seems to come from the fuel pump under the back seat. If i get the wires away from it, it reduces it, but not enough. Help!!! Quote God damn its hot today. My balls are stuck to my leg. Link to comment Share on other sites More sharing options...
coyotechromez Posted March 24, 2010 Report Share Posted March 24, 2010 (edited) Had the same prob in wifes 01 Accord we even switched to Street Wires ZR 9 RCA's, never figured it out. Sold it! Edited March 24, 2010 by coyotechromez Quote Link to comment Share on other sites More sharing options...
huh?do-what? Posted March 24, 2010 Author Report Share Posted March 24, 2010 oh crap. I can't do that. Quote God damn its hot today. My balls are stuck to my leg. Link to comment Share on other sites More sharing options...
mxman38 Posted March 24, 2010 Report Share Posted March 24, 2010 my brothers pontiac is the same way, but switching radios helped alot... still didnt solve it. Quote Link to comment Share on other sites More sharing options...
coyotechromez Posted March 24, 2010 Report Share Posted March 24, 2010 oh crap. I can't do that. Tranny went out! LOL Didn't sell because of engine noise. Quote Link to comment Share on other sites More sharing options...
dwright27 Posted March 24, 2010 Report Share Posted March 24, 2010 i remember reading a few days ago, that where the speakers where screwed into the door, was causing the engine noise cause it was acting like a ground r some shit ..:/ just a thought ... are the screwed to the sheet metal in the doors? Quote 2006 F-150 4 DC XL M2 18's Walled Daily Driver XS Power 4 DC 3.5kw Team DC Team S.P.L. Lot of Audio Technix and 1/0 DC Audio Dealer American Bass Dealer XS Power Dealer Audio Technix Dealer Link to comment Share on other sites More sharing options...
MikeyF Posted March 24, 2010 Report Share Posted March 24, 2010 Is it a Pioneer radio? Quote 12" DC LVL 4 Sundown 1200D PG RSDs PPI PC2100 Alpine 9886 Link to comment Share on other sites More sharing options...
baaudio Posted March 24, 2010 Report Share Posted March 24, 2010 did you try a different hu? Are speakers run off amp or hu? Maybe try replacing rcas Quote Team NWSPL baaudio Build Log 2001 GMC Sierra walkthrough 4 Mechman Elite 370s, 10 AGM batteries, 3 Crossfire XS v2 18s, Crossfire 8k Link to comment Share on other sites More sharing options...
huh?do-what? Posted March 24, 2010 Author Report Share Posted March 24, 2010 speakers are on a 4 channel amp. No rears only front. Fronts are mounted to a wooden plate to keep from hitting window. It is a Pioneer radio, but I get the noise with rcas unhooked from radio. Tried different head units, different amps. I have gone through every noise troubleshooting checklist I can find. I tried isolating the switched power lead from vehicle with a relay. No help. Had noise with factory alternator and HO alternator. Quote God damn its hot today. My balls are stuck to my leg. Link to comment Share on other sites More sharing options...
MikeyF Posted March 24, 2010 Report Share Posted March 24, 2010 Has each different HU you tried been different than a Pioneer? Pioneers are notorious for the engine whine... Quote 12" DC LVL 4 Sundown 1200D PG RSDs PPI PC2100 Alpine 9886 Link to comment Share on other sites More sharing options...
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