Car amp killing battery or car - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 3rd October 2009, 09:27 AM   #1
diyAudio Member
 
Join Date: Oct 2009
Exclamation Car amp killing battery or car

Ok so I just bought a Dual 300watt AMP and hooked it up to my 8" Bazooka, as soon as I hook it all up, my car has trouble starting and once it does it idles very weird (like it revs then like craps out then right before it dies it revs again) anyways, i have the 12v attached directly to the positive node of the battery, the rem is hooked up to my HU, idk what to do. any ideas. Oh yeah i have a 2003 Mitsubishi lancer if that helps.
  Reply With Quote
Old 3rd October 2009, 12:53 PM   #2
diyAudio Member
 
Join Date: Sep 2009
Location: Wisconsin
Make sure your battery connections are tight, any loose connection will cause a voltage drop. Remove the remote wire from the amp and see if your car will run better. If not remove the + wire from the amp and try it.
Basically remove the wires from your amp until it clears up.
  Reply With Quote
Old 3rd October 2009, 04:36 PM   #3
Glowbug is offline Glowbug  United States
diyAudio Member
 
Glowbug's Avatar
 
Join Date: Feb 2006
Location: Hillsborough, NC
How do you have the amp grounded?
__________________
Jim
The machine does not isolate us from the great problems of nature but plunges us more deeply into them. - Antoine de Saint-Exupéry
  Reply With Quote
Old 4th October 2009, 07:00 PM   #4
TO-3 is offline TO-3  Peru
diyAudio Member
 
TO-3's Avatar
 
Join Date: Feb 2004
Location: Phoenix, Arizona
Send a message via Yahoo to TO-3
Quote:
Originally Posted by xstation360 View Post
Ok so I just bought a Dual 300watt AMP and hooked it up to my 8" Bazooka, as soon as I hook it all up, my car has trouble starting and once it does it idles very weird (like it revs then like craps out then right before it dies it revs again) anyways, i have the 12v attached directly to the positive node of the battery, the rem is hooked up to my HU, idk what to do. any ideas. Oh yeah i have a 2003 Mitsubishi lancer if that helps.
So, if you disconnect the amp, does your car work fine? Could be a defective amplifier. You can also try disconnecting the output from the amplifier and see if that has any affect on your car.
__________________
Check out Tube Driver BLUE products at: www.tubedriver.com
  Reply With Quote
Old 4th October 2009, 08:46 PM   #5
diyAudio Member
 
Join Date: Apr 2003
Location: Portland,Oregon
Blog Entries: 4
Send a message via AIM to DigitalJunkie
A friend once had a similar problem,and we discovered that his ground connections were crummy and causing a large voltage drop. Go over the grounds from the battery/frame/engine block and make sure they're tight.
  Reply With Quote
Old 4th October 2009, 09:15 PM   #6
ppia600 is offline ppia600  United States
diyAudio Member
 
Join Date: Jun 2007
Location: Louis y ana
I doubt a 300 watt amp has enough balls to cause your car to idle crazy. Make sure your positive battery terminal is clean and secure and also make sure the wire you chose behind the deck is the correct one, I'd use the "acc 12v" wire. If you tie into the wrong wire that could cause issues.
__________________
Don't worry... you can always turn the gain down!
  Reply With Quote
Old 5th October 2009, 04:49 PM   #7
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by TO-3 View Post
So, if you disconnect the amp, does your car work fine? Could be a defective amplifier. You can also try disconnecting the output from the amplifier and see if that has any affect on your car.
When i remove my amp the car runs fine, it just takes a bit to charge.
  Reply With Quote
Old 5th October 2009, 04:50 PM   #8
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by Glowbug View Post
How do you have the amp grounded?
I have it grounded to the frame in my trunk
  Reply With Quote
Old 6th October 2009, 04:13 PM   #9
TO-3 is offline TO-3  Peru
diyAudio Member
 
TO-3's Avatar
 
Join Date: Feb 2004
Location: Phoenix, Arizona
Send a message via Yahoo to TO-3
Quote:
Originally Posted by xstation360 View Post
When i remove my amp the car runs fine, it just takes a bit to charge.
So, when you installed your amp, did the B+ wire spark as you connected it to the amp? Or, is the problem only realized when you start your vehicle? Do you have a multimeter?

I am thinking that the power supply in your amp may be blown.
__________________
Check out Tube Driver BLUE products at: www.tubedriver.com
  Reply With Quote
Old 18th October 2009, 05:29 PM   #10
diyAudio Member
 
Join Date: Mar 2009
I would check the voltage on the battery and alternator before, and after the power is supplied to the amplifier. It could be a bad connection between either the power or the ground. And in a worse case, bad connections between them both. I've never seen a drop in engine idle speed that drastic before from a poorly grounded, or poorly connected power wire. I think the problem is deeper than the amplifier. The amp is just what triggered the problem to become reconized. Because its power draw in some way effected the stock electrical dramaticly. I think the problem might be with the alternator and its charging of the battery. That, or the battery is damaged and isn't holding a charge strong enough to support a clean start up while the amplifier is drawing current.
Or like TO-3 said, it could be some kind of a defect or malfunction within the actual equipment. And if you don't have a multimeter, I highly advice you pick one up if you wanna DIY. Let me know how its works for you. If it doesn't help and the problem persists, we'll deal with it then. But either way I'm sure we'll get it solved. Its just a matter of trouble shooting the system. When you reply, try and give as much information about everything you did, the current status of the vehicle, and any changes you may have noticed.
__________________
The level of performance in any mobile sound system is a direct result of the way it was installed. Passion, pride, perfection.
J. Kim~I.A.S.T.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
killing op amp osclation wleediy Solid State 6 29th January 2008 11:50 AM
Grr I think I'm killing my own project pjpoes Solid State 3 7th June 2007 12:37 AM
Inrush Current killing fuses Wynand Chip Amps 29 16th February 2006 09:43 AM
Goal: Build a GC without killing myself! GrahamnDodder Chip Amps 24 8th October 2003 11:32 PM


New To Site? Need Help?

All times are GMT. The time now is 05:31 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2