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View Full Version : Any ideas? Car fine....diff car aftr few trips......details inside



Jessejamesb5
12-17-2012, 02:47 PM
So, got a 01 a4 quat. Its got about 180k on it. maintained well. New alternator bout a year/year n a half ago. Nee battery bout a week ago(more details posted below).

So, i get into my car last week and had to use my jumppack everytime I wanted to drive somewhere. Never showed any othr signs while driving. Then one day the volts droppd low as shit. And this was while I driving at night with the lights,fogs and radio on. Then the radio cut off(was thnkn bcuz the volts) startd driving and,it came back on and,all was good. So I wnt and got my battery tested and it was bad and they gave a new free replacmnt under warranty.

All was very nice these past few days, but last night I was droppng my kids off about 25min trip one way. Made it the parking lot and as I got the kids out and loaded up I heard my warning beep in my car. As I was leaving the car was literally stuvk in 4th gear or somthn, bcuz from dead stop it drove sooooo slow and as I got on the freeway it started pickn up speed, got up to 70and it was doing anythng but up around 3500-4000rpms not shifting up or down. Warning beep again snd see battery light, on,the freeway doin 70 and the car volts was damn near down n,the red. Made it home and then I,had to move it a few hours later...the car started perfectly. Strong, and very little to crank rite up. Went around the block....it was driving and shifting jus fine.

As that was it, went out today and it was fine again. The battery is fine. No,charging on my part or nothin. Ddnt thnk the alternator wit it not bein 2yrs old, and the fact That the battery obviously isnt bad. Any ideas or what the hell anyone thnks it could be . I really do need help with this one.

Lornnn
12-17-2012, 05:03 PM
Not sure if this is any help but I saw a video of a B5 S4 with strange, intermittent power issues and it turned out that one of the main grounds was loose - in his case the one on the firewall close to the coolant tank.

Jessejamesb5
12-17-2012, 11:03 PM
Im gna check into that asap. As your the 3rd person to tell me that. I also noticed that the red(hot) wire on my battery, well can see that the wire itself looks a bit corroded, greenish in color....could that play a role? Deff lookn into the grounds n the meantime. Also.....went to work, which is bout a 15-20 min ride, and it droppd down to 9ish...but while driving it went back up to 11ish. Seems like its getn worse with the quickness its droppn volts. Thnx alot bro

Jessejamesb5
12-17-2012, 11:22 PM
Im gna check into that asap. As your the 3rd person to tell me that. I also noticed that the red(hot) wire on my battery, well can see that the wire itself looks a bit corroded, greenish in color....could that play a role? Deff lookn into the grounds n the meantime. Also.....went to work, which is bout a 15-20 min ride, and it droppd down to 9ish...but while driving it went back up to 11ish. Seems like its getn worse with the quickness its droppn volts. Thnx alot bro

Jessejamesb5
12-18-2012, 04:53 AM
Always a good start on my day...leaving work jus now and it had to be jumped. Dude told me to pop my black wire off my battery and if it stays runnin its not the alternator...i popped it off and it stayed running. So im assuming I did this correct and am now leaning towards a bad ground possibly. Ive heard of the battery wire trick from muscle car dudes and knowing their cars have a fraction of wires and electric reliability that the good ole Audis do. Does.this rule/method safely apply to my car?

As stated above, I have one general location to check for a ground....are there any others I should be aware of to check? I need a chiltons/haynes manual right about now hahaha.