Karkov Posted December 2, 2013 Report Share Posted December 2, 2013 Lots of threads on this already but none that seems to answer my specific question or solve my exact problem. 2007 Chevy Tahoe, PCM controlled Mechman 370 Elite alt, vehicle has the ground sensor under the hood that the ground has to run through. Can't have additional grounds with the sensor because the PCM controls how much it will ramp up the alt depending how much current the sensor sees so all grounds have to basically pass through the sensor. Mechman confirmed this. Literally go from alt casing, through the sensor to the front batt, then from negative post to next battery and so on, whether you have 1 battery or 100 all negatives have to get connected together without grounding to the frame/chassis/body because then the PCM will not see 100% of the current and your alt will not perform well AND your voltage will fluctuate oddly. Because of this my amps are grounded right to the rear battery's negative posts and because of this I am getting alt whine that fluctuates with engine RPM. I tried doing the big 3/4/5 but voltage would be all over the place, eliminated grounds one at a time and same thing. Tried adding grounds in the rear for the rear batts. and same thing. Literally got to the point where I have just the one ground as stated above because extra grounds do not work. yes, the factory grounds under hood are all still there and go through the sensor as they should. What else can I do to eliminate the alt whine? 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
n8ball2013 Posted December 2, 2013 Report Share Posted December 2, 2013 Pion3er head unit right may not benyiur alt THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
Soccerballzs Posted December 2, 2013 Report Share Posted December 2, 2013 Could it be your HU seen it was a Pioneer there are notorious for this issue. http://www.stevemeadedesigns.com/board/garage/vehicle/2438-jeep-commander/I Pioneer P99RSAmpere 38002-Ampere 125/44-6.5 inch Hertz HSK XL Mids4-8 inch JL Audio ZR Midwoofer 2-5.25 Satori Mids2-Morel Tweeters, 2 Hertz Milles 3 inch on A pillars2-Hertz Silk tweeters DC Audio Level 5/12 Skyhigh Wire Mechman 320 XS Power D3100MO Funniest Thread of the Year 2013: http://www.stevemead...dy-being-a-pos/ Link to comment Share on other sites More sharing options...
Guest DC Power Kyle Posted December 2, 2013 Report Share Posted December 2, 2013 I recommend the opposite. For PCM controlled I tell them to leave the factory wiring in the current sensor and ground additional wires without going through the current sensor. This usually fixes the voltage spikes. Link to comment Share on other sites More sharing options...
Karkov Posted December 2, 2013 Author Report Share Posted December 2, 2013 Could it be your HU seen it was a Pioneer there are notorious for this issue. oh shizz, really guys? what do people do to combat it? I have checked all connections so many times over that it's seriously time for something to change to get rid of it, I thought it was wiring related. I know I have that other thread with the bypass thingy not working or whatever too.... I vaguely remember about someone else with HU as culprit in my reading but I thought that was like a rare case kind of a fluke type of deal or something. EDIT: typed this before I saw above post 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
Soccerballzs Posted December 2, 2013 Report Share Posted December 2, 2013 It happens with Pioneer units when a rca is unplugged under power. Piezo bad in unit. I have my power wire for radio running to fuse and constant on the cig lighter. I also have the case grounded on it also. I have no whine in mine. Is the wine at no volume level also? Some ground there rca's plug somehow. Not my choice though. http://www.stevemeadedesigns.com/board/garage/vehicle/2438-jeep-commander/I Pioneer P99RSAmpere 38002-Ampere 125/44-6.5 inch Hertz HSK XL Mids4-8 inch JL Audio ZR Midwoofer 2-5.25 Satori Mids2-Morel Tweeters, 2 Hertz Milles 3 inch on A pillars2-Hertz Silk tweeters DC Audio Level 5/12 Skyhigh Wire Mechman 320 XS Power D3100MO Funniest Thread of the Year 2013: http://www.stevemead...dy-being-a-pos/ Link to comment Share on other sites More sharing options...
mmets Posted December 2, 2013 Report Share Posted December 2, 2013 I would love to help you out but we have chatted a few times with my set up. Honestly the only thing that happens to me with my set up is when I first start it is about 15 to 15.2 on the meter then drops down to 14.7/8 after it gets warmed up. The only time I have seen it drop pretty low was when I went to pass someone the other day and when the vehicle downshifted the volts went down to 14 for a sec but went back up to normal. Not really sure why. You have seen my grounds and the only one that goes through the sensor is the stock one and another 1/0 gauge. don't remember if that is the one to the alt casing or to the body. http://www.stevemeadedesigns.com/board/topic/177477-slowboring-07-trailblazer-build/Pioneer DEH-80PRSPRV 8MR400-NDY (eight) PRV TW350Ti (6)Sky High 1/0 OFC, 12 gauge and 8 gaugeTM Metalworkz battery terminals 120 sqft HushmatXS Power D3100 (6)Singer 350 Amp Alt Singer 320 (2)American Bass SQL3200 JL Audio JX360/4 Crossfire XS 8K (2) DC Audio XL 15s (6) Link to comment Share on other sites More sharing options...
Karkov Posted December 2, 2013 Author Report Share Posted December 2, 2013 It happens with Pioneer units when a rca is unplugged under power. Piezo bad in unit. I have my power wire for radio running to fuse and constant on the cig lighter. I also have the case grounded on it also. I have no whine in mine. Is the wine at no volume level also? Some ground there rca's plug somehow. Not my choice though. Yes, volume at 0 on HU but HU on and it stills whines, changing pitches at different RPM's 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
Karkov Posted December 2, 2013 Author Report Share Posted December 2, 2013 I would love to help you out but we have chatted a few times with my set up. Honestly the only thing that happens to me with my set up is when I first start it is about 15 to 15.2 on the meter then drops down to 14.7/8 after it gets warmed up. The only time I have seen it drop pretty low was when I went to pass someone the other day and when the vehicle downshifted the volts went down to 14 for a sec but went back up to normal. Not really sure why. You have seen my grounds and the only one that goes through the sensor is the stock one and another 1/0 gauge. don't remember if that is the one to the alt casing or to the body. I have Qty. 1 of 1/0 AWG OFC going through the sensor as well but no other grounds to speak of (aftermarket grounds anyway) I have no fluctuation in voltage though. Mine also goes to 15+ at start up then simmers down to about 14.6/14.7 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
Soccerballzs Posted December 2, 2013 Report Share Posted December 2, 2013 It happens with Pioneer units when a rca is unplugged under power. Piezo bad in unit. I have my power wire for radio running to fuse and constant on the cig lighter. I also have the case grounded on it also. I have no whine in mine. Is the wine at no volume level also? Some ground there rca's plug somehow. Not my choice though. Yes, volume at 0 on HU but HU on and it stills whines, changing pitches at different RPM's Do you have system hook up to steering wheel controls? Try the rca ground thing! http://www.stevemeadedesigns.com/board/garage/vehicle/2438-jeep-commander/I Pioneer P99RSAmpere 38002-Ampere 125/44-6.5 inch Hertz HSK XL Mids4-8 inch JL Audio ZR Midwoofer 2-5.25 Satori Mids2-Morel Tweeters, 2 Hertz Milles 3 inch on A pillars2-Hertz Silk tweeters DC Audio Level 5/12 Skyhigh Wire Mechman 320 XS Power D3100MO Funniest Thread of the Year 2013: http://www.stevemead...dy-being-a-pos/ Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.