Author Topic: discharging  (Read 936 times)

Offline VTMopar

  • Sr. Member
  • ****
  • Posts: 1056
  • '70 Challenger Convertible, '74 Challenger Rallye,
discharging
« on: March 26, 2010 - 10:25:52 PM »
I've read the old posts and understand that discharging at idle is fairly common (I recently put relays on my headlights - it helped as they stay nice & bring now :)      But -- I recently invested in an original AMFM and installed it (I sent out to Wards first - so it should be fine) but it doesn't put out the volume it should -- also the volume decreases at idle and picks up when I rev the motor (but still not as strong as it should).   Any ideas on what is causing this?     

Thanks
VT Mopar
VT MOPAR




Offline Bullitt-

  • Permanent Resident
  • *******
  • Posts: 12167
  • Better Things To Come Member Since 2/16/06
Re: discharging
« Reply #1 on: March 26, 2010 - 10:40:22 PM »
As to the radio volume, what kind of speakers are you using?  Any speaker will have lowered output if the polarity is reversed.   If you read any of my charging system posts you already know to burnish all connections, my car does not discharge at idle in gear.
Wade  73 Rallye 340..'77 Millennium Falcon...13 R/T Classic   Huntsville, AL
Screwed by Photobucket!

Offline dodj

  • Sr. Resident
  • ******
  • Posts: 6197
Re: discharging
« Reply #2 on: March 27, 2010 - 06:50:43 AM »
For the radio volume issue to be a car problem as opposed to a faulty radio, the voltage would have to be fluctuating a fair bit. Disconnect the radio and check the voltage @ idle and when running. I would tend to think it is the radio though. Speakers wired correctly and of the right type?
Scott
1973 Challenger  440 4 spd 
2007.5 3500 6.7 Cummins Diesel, Anarchy tuned.
Good friends don't let friends do stupid things. ........alone.

Offline ShelbyDogg

  • Sr. Resident
  • ******
  • Posts: 5007
Re: discharging
« Reply #3 on: March 28, 2010 - 10:08:39 AM »
I read on the web that says that some alternator rebuilders were using the higher output armature with the lower output housings, not knowing the difference, causing the low output at idle.  Have you tried a couple of different alternators?
Rob

3 E-bodies, Megasquirt-1v3.0, Edelbrock Pro-Flo-1, Holley C950, FAST EZ-EFI; say no to carbs...yes to throttle bodies

My Pace Car restoration thread:
http://www.cuda-challenger.com/cc/index.php?topic=44869.0