Grant Whalen Posted April 29, 2014 Report Share Posted April 29, 2014 so as some of you know i am working on my build. i have my alternator installed and the x15 in a crap box just so i could go to a buddys house and stuff to dd1 an amp and he gave me this zeus amplifier from hifonics. my voltmeter never drops below 13.2 cruising and when idle never below 13,0. when idling at a sign etc my rpms drop down below 550 and my car starts to shake as if it is about to kill itself. i am trying to figure out what it is ive loosened the belt on the alt turned the gain on the amp down and nothing has changed!!! HELP ME!!! Link to comment Share on other sites More sharing options...
BigManAC Posted April 29, 2014 Report Share Posted April 29, 2014 That to me sounds more like a mechanical problem than an electrical although it might have something to do with your alt belt. Both of my parents vehicles have done that to the point where they would almost shut off (my dad's actually did once). I'd have the mechanics looked at to see if that was it. 2001 Saturn L200-Sony MEX-BT4100PFRONT STAGE:- (4) Crescendo PWX 6- Cadence XA250.2SUB STAGE:-Fi Audio BL 15 (Sealed Off)-Crescendo BC2kELECTRICAL:- Singer 240A alt - XS Power D3400- SkyHigh OFC power/speaker wire- Big 3 with SkyHigh 0gaugeBuild Log: Click HereScores: 146.5db @ 29hz Outlaw Link to comment Share on other sites More sharing options...
DubNDodge Posted April 29, 2014 Report Share Posted April 29, 2014 You loosened the belt or tightened it? When you amplifier calls for current it'll put a load on your alternator and return will bog your engine down. Your ECU should then rise up the rpms to compensate a bit. i.e. when I put both windows up at the same time at idle I'll hear my engine bog down to about 500rpm from 600rpm and then my ECU will rise the rpm to about 900 then back down to 700rpm. '01 Dodge Stratass Sealed Trunk Build Log 2008 Honda Fit Sport Build Log On 10/3/2013 at 10:00 AM, ROLEXrifleman said: Anyone who says they knew everything they wanted out of life at 19 can go suck a bag of dicks cause they are lying to themselves or brought up in a cult. Link to comment Share on other sites More sharing options...
bighossf150 Posted April 29, 2014 Report Share Posted April 29, 2014 It's your alt bogging your motor down, shit happened to me while demoing at Turkey drag and killed my truck lmfao Used to have a loud truck 2009 Corvette Z06, H/C/I, 150 shot, g force tune, 730rwhp/690rwtq 2013 F-150 limited, MPT Tune, leveled on 35"s Link to comment Share on other sites More sharing options...
Grant Whalen Posted April 29, 2014 Author Report Share Posted April 29, 2014 I did both of tightened and loosened I went as loose as squeal on startup and just fine but sitting at 11.9 v and then to where it is now sit at 13.9-14.1 and bogs down Link to comment Share on other sites More sharing options...
Grant Whalen Posted April 29, 2014 Author Report Share Posted April 29, 2014 @bighoss new belt? Or what more reserve? Link to comment Share on other sites More sharing options...
bighossf150 Posted April 29, 2014 Report Share Posted April 29, 2014 Keep it revved up Used to have a loud truck 2009 Corvette Z06, H/C/I, 150 shot, g force tune, 730rwhp/690rwtq 2013 F-150 limited, MPT Tune, leveled on 35"s Link to comment Share on other sites More sharing options...
Grant Whalen Posted April 29, 2014 Author Report Share Posted April 29, 2014 So it doesn't matter how much reserve? Just keep it revved? Link to comment Share on other sites More sharing options...
TRON Posted April 29, 2014 Report Share Posted April 29, 2014 Your belt should be tight or else it will slip. Engine bogging is pretty common when a big load is applied to the alternator. Most alternators require 1500 rpm or more to run at full output, that's why when you're cruising its not an issue. Avalanche Alpine Type S comps Alpine Type S 10'' Alpine MPR-F300 Alpine MRX-M50 Mechamn 270 XS Power d3400s Link to comment Share on other sites More sharing options...
rockFord_Expedition Posted April 29, 2014 Report Share Posted April 29, 2014 Your engine relies on electrical to keep running. Spark plugs, coils, etc. when there isn't enough current (notice I said current and not voltage) to go around this is what happens. Well one of the things. Old School/New School RF Build March 2015 SOTM Winner How to crimp large wire Link to comment Share on other sites More sharing options...
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