Results 1 to 5 of 5

Alt voltage drop w/asp pulley, A4 cars

This is a discussion on Alt voltage drop w/asp pulley, A4 cars within the External Engine forums, part of the LSx Technical Help Section category; The old alternator was reading 14.5 cold and only 13.1-13.4 volts with a warm engine and I was also having ...

  1. #1
    Another Slow LS1 shortdog's Avatar
    Join Date
    Aug 2005
    Location
    St. Louis, MO
    Age
    46
    Posts
    43

    Pewter
    99 Z28 A4

    Alt voltage drop w/asp pulley, A4 cars

    The old alternator was reading 14.5 cold and only 13.1-13.4 volts with a warm engine and I was also having the problem with the guages flickering and trip odo resetting itself due to a low battery (99 tsb bulletin). This was before the asp install. Now, with the asp pulley and new alternator, it reads around 14.5 on cold starts, but it drops at around 13.6-13.7 after it's warmed up and running. However, my battery stayed charged at around 12.8. Is this normal for the alt voltage to drop after the car is fully warmed up? For the A4 cars with asp pulleys, where does your gauge read at idle and what's considered acceptable? Any help is appreciated.

    Edit: Mods, remove duplicate post. Thanks.

  2. #2
    Another Slow LS1 shortdog's Avatar
    Join Date
    Aug 2005
    Location
    St. Louis, MO
    Age
    46
    Posts
    43

    Pewter
    99 Z28 A4

    Anyone?

  3. #3
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    12.8 sounds perfect. Are there any problems or are you just asking if it is right? Everything sounds good to me.

  4. #4
    Another Slow LS1 shortdog's Avatar
    Join Date
    Aug 2005
    Location
    St. Louis, MO
    Age
    46
    Posts
    43

    Pewter
    99 Z28 A4

    My main concern was if it's normal for the voltage gauge to drop when the car is warmed up.

  5. #5
    Senior Member
    Join Date
    Jul 2005
    Location
    Jacksonville, FL
    Posts
    2,725
    Sounds normal to me - gauge will slowly drop after a cold start. Mine will even "dip" from time to time. Remember reading some posts about A4 guys bumping up their in gear idle a little after an underdrive pulley install if you have a stereo that draws a lot.
    Last edited by 2001NBMZ28; 03-17-2007 at 01:10 PM.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Voltage Drop issue
    By HottNixLS1 in forum General Help
    Replies: 5
    Last Post: 10-08-2006, 04:05 PM
  2. MMS Crank Pulley, Reichard Racing Pulley
    By Hodgesz28 in forum Parts For Sale / Trade
    Replies: 0
    Last Post: 08-18-2006, 09:38 AM
  3. Replies: 1
    Last Post: 01-18-2006, 01:11 PM
  4. Max out that 6 rib ATI Procharger Pulley Setup.. 2.5" 6rib Pulley for Sale
    By HUGGER ORANGE SS in forum Parts For Sale / Trade
    Replies: 0
    Last Post: 01-16-2006, 07:37 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •