voltage problems/idle problems??!!
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Joined: Jul 2002
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voltage problems/idle problems??!!
Vehicle: 1997 A6Q 2.8l 12v v6 SOHC sedan
Stereo installed:
2 12inch alpine subs 1000Watts RMS
custom box
sound deadening
2 MB Quart 6by9s coaxil
1 inch titanium MBQuart tweeters (2)
2 3.5 MBQuart coaxil components
1 XTANT A6001 CLass D amp
1 A4001 Xtant amp
1 5 farad cap box
1 pioneer DEHP9300 radio head unit
Installed at ABT electronics (chicagoland area)
Problem: I have problems with idle even ehen music is not turned up and overvoltage when turned up. car Stalls sometimes with dips at starup (CE light and Generator light come on along with drop to 200rpm momentarily then raise back up to normal with not warning lights) Still have factory battery which is due up in OCT and stock 120amp bosch alternator. Was told by ABT I put out 3000Watts. I am thinking of getting an Optima battery very soon along with by stock 120amp bosch alternator upgraded to 150 amp at a place nearby call Auto import electronics.--I believe they upgrade the brushes and the wiring on the alternator. Will this help with my problems or are there any other solutions. Will also buy new voltage regulator.
Brad
Stereo installed:
2 12inch alpine subs 1000Watts RMS
custom box
sound deadening
2 MB Quart 6by9s coaxil
1 inch titanium MBQuart tweeters (2)
2 3.5 MBQuart coaxil components
1 XTANT A6001 CLass D amp
1 A4001 Xtant amp
1 5 farad cap box
1 pioneer DEHP9300 radio head unit
Installed at ABT electronics (chicagoland area)
Problem: I have problems with idle even ehen music is not turned up and overvoltage when turned up. car Stalls sometimes with dips at starup (CE light and Generator light come on along with drop to 200rpm momentarily then raise back up to normal with not warning lights) Still have factory battery which is due up in OCT and stock 120amp bosch alternator. Was told by ABT I put out 3000Watts. I am thinking of getting an Optima battery very soon along with by stock 120amp bosch alternator upgraded to 150 amp at a place nearby call Auto import electronics.--I believe they upgrade the brushes and the wiring on the alternator. Will this help with my problems or are there any other solutions. Will also buy new voltage regulator.
Brad
AudiWorld Super User
Joined: Jul 2001
Posts: 14,487
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From: Orlando, FL
3000 watts my ***
Your class D isn't putting out more than 600-800w and the other amp isntputting out more than 400-600w.
The max ratings by Xtant are 600 and 400, but there is NO WAY IN HELL those amps are underrated by 3x their potential.
So first off, replace the stock battery. Put in an Optima starter battery (like a red top). DO NOT use a deep cycle to replace your main battery.
Start with this. A 120amp alt should be PLENTY for the 1000-1400 watts your pushing, unless, the alt isn't working at maximum potential.
The voltage regulator may be IN the alternator, or there may an outboard one, not sure how it is on the Audi, that Auto electronics place should be able to tell you.
I personally think a fresh battery will help a lot, since a stock battery from 97 as at the end of it's useful life pretty much.
From there, have them test your alternator. If it's not a huge cost to have it rebuilt up to 150a from 120a, go for it.
The max ratings by Xtant are 600 and 400, but there is NO WAY IN HELL those amps are underrated by 3x their potential.
So first off, replace the stock battery. Put in an Optima starter battery (like a red top). DO NOT use a deep cycle to replace your main battery.
Start with this. A 120amp alt should be PLENTY for the 1000-1400 watts your pushing, unless, the alt isn't working at maximum potential.
The voltage regulator may be IN the alternator, or there may an outboard one, not sure how it is on the Audi, that Auto electronics place should be able to tell you.
I personally think a fresh battery will help a lot, since a stock battery from 97 as at the end of it's useful life pretty much.
From there, have them test your alternator. If it's not a huge cost to have it rebuilt up to 150a from 120a, go for it.
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