Click to go to Forum Home Click to go to maXbimmer Home

Go Back   maXbimmer Forums > General > General Discussion
User Name
Password


Welcome to Maxbimmer.com!

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Reply
 
Thread Tools Rate Thread Display Modes
Old 03-25-2010, 04:18 PM   #1
pawcio
6th Gear Member
 
pawcio's Avatar
 
Join Date: Apr 2009
Location: Mississauga, ON
Posts: 1,606
Diagnosis: battery, starter or alternator?

today my car didn't start. well it started several times today but not the last time. no turn over, only a clicking noise. battery, starter or alternator? i'm hoping its the battery but i guess i'll have to see later today.

i plan to test it when i get back from work.
is my logic for these three scenario's correct?
1) get boosted, car does not want to start ---> starter
2) get boosted, car starts but dies after several minutes? ---> alternator
3) get boosted, car starts and keeps running ---> battery

thanks.

p.s. how long would it run just off the battery before it stalls if the alternator is done for?
__________________
__

pawcio is offline   Reply With Quote
Old 03-25-2010, 05:55 PM   #2
Junaid
4th Gear Member
 
Join Date: Nov 2007
Location: Toronto
Posts: 670
if the battery is completely dead then after you drive it will not start, but boost it and drive for a bit and then park it and see if there is more juice then before, if so then its battery since alternator is trying to charge it, alternatively get a multimeter and check the voltage with the car running, it should read 14V
__________________


Needs more mods
Junaid is offline   Reply With Quote
Old 03-25-2010, 06:01 PM   #3
pawcio
6th Gear Member
 
pawcio's Avatar
 
Join Date: Apr 2009
Location: Mississauga, ON
Posts: 1,606
the thing is the car isn't at my house right now. when i get it boosted and it runs for while, i'll try to drive it home, shut it off and try to start it again. if it doesn't start i'll assume its the battery and get it checked and replaced. i'm really hoping its the battery. don't want to find out that its the alternator while on my way home.

i'm still wondering though, how much time the car could run after boosting if the alternator is bad. the battery isn't new so i'd assume a few minutes at idle and it would stall.
__________________
__

pawcio is offline   Reply With Quote
Old 03-25-2010, 06:06 PM   #4
Junaid
4th Gear Member
 
Join Date: Nov 2007
Location: Toronto
Posts: 670
im not sure how much time you will have, my guess is 15-20 mins, depending on how strong your battery was before.
__________________


Needs more mods
Junaid is offline   Reply With Quote
Old 03-25-2010, 09:29 PM   #5
pawcio
6th Gear Member
 
pawcio's Avatar
 
Join Date: Apr 2009
Location: Mississauga, ON
Posts: 1,606
ok, so here's an update. i'm slightly more confused, but i know its not the starter.
so got it boosted and it idled for 15 minutes or so before i headed home. once at home it didn't start again. so then i'm thinking battery.
i went to get it checked and the voltage was 11.69V and with 289CCA, should be 630CCA, but the conclusion was "battery is good, but low on charge, charge the battery and return to vehicle"
so i got it charged and tested again and it should be good. this would point a finger to the alternator, no?. btw, i noticed that the date stamp on the bettery was Nov 08, so its only ~16 months old.

if i got boosted and drove home the, 30 minute drive from where the car was should have given the alternator enough time to charge the battery, no? anyway, its charged now, i will install it tomorrow see if it starts and then see if it charges. i'll also get it tested with a multimeter.

it could still be that something is intrinsically wrong with the battery and it can't hold a proper charge and the alternator is good....or the alternator is crapping out and can't fully charge the battery. i still don't know.
__________________
__

pawcio is offline   Reply With Quote
Old 03-25-2010, 11:14 PM   #6
slemmer
Driving in the fast lane
 
slemmer's Avatar
 
Join Date: Dec 2002
Location: Missed in 'sauga
Posts: 2,997
Did you say you had the battery checked? Check the electrolyte levels unless its a gel bat. I'm red flagging their comment that the battery test revealed a low CCA result. Did you have a chance to fully charge the battery with a charger afterwards? What was the voltage reading with the car running? If it's on the high side then I definitely would check the battery fluid levels.
__________________

'04 645cic
'05 GMC Sierra SLT Z71 CCSB 4x4
'02 Regal LS
'00 740i Sport
slemmer is offline   Reply With Quote
Old 03-26-2010, 01:19 AM   #7
doogee
Stance is Gay.
 
doogee's Avatar
 
Join Date: Jun 2007
Location: Ancaster
Posts: 3,449
Send a message via MSN to doogee
Sounds like either you have something draining the battery overtime, or it's time for a new Alternator. A 30 min drive should charge it.

But there is also the possibility the battery is toast. Tough call.
__________________


Dakar M3 Track Build Thread
doogee is offline   Reply With Quote
Old 03-26-2010, 07:43 AM   #8
pawcio
6th Gear Member
 
pawcio's Avatar
 
Join Date: Apr 2009
Location: Mississauga, ON
Posts: 1,606
while running the voltage should be 14V.
if the alternator is bad it would be lower, but what about if the battery is bad. will a 'dead' battery still read 14V while running? would that be the final test to decide between battery and alternator? or is a crappy battery still going to read under 14V while running?
__________________
__

pawcio is offline   Reply With Quote
Old 03-26-2010, 07:44 AM   #9
dbworld4k
Addict
 
dbworld4k's Avatar
 
Join Date: Aug 2006
Location: YYZ / ORD
Posts: 7,251
I had similar symptoms last Fall, ended up replacing both the Alternator and Battery...
__________________


'02 ///M5 Imola Red / Imola Red '09 335i Alpine White / Coral Red

Past:
'04 E55 AMG Brilliant Silver / Anthracite
'96 318i Alpine White / Black
'01 330Ci Titanium Silver / Coral Red
'96 328i Jet Black / Black
dbworld4k is offline   Reply With Quote
Old 03-26-2010, 12:27 PM   #10
pawcio
6th Gear Member
 
pawcio's Avatar
 
Join Date: Apr 2009
Location: Mississauga, ON
Posts: 1,606
Quote:
Originally Posted by dbworld4k View Post
I had similar symptoms last Fall, ended up replacing both the Alternator and Battery...
i hope that's not the case. my new plan is to get the battery fully charged, measure it it a multimeter, place it back in the car, start the car...hopefully read 14V at the terminals, which would determine whether the charging system is ok. turn off the car and monitor the voltage over time while the car is off with a mutlimeter. a member of another forum told me that a relay in his car was faulty, which resulted in power being drawn from his battery when the car was off, eventually discharging it.

any other suggestions or confirmation of my plan would be appreciated. thanks.
__________________
__

pawcio is offline   Reply With Quote
Old 03-26-2010, 06:55 PM   #11
pawcio
6th Gear Member
 
pawcio's Avatar
 
Join Date: Apr 2009
Location: Mississauga, ON
Posts: 1,606
/thread

bimmersport is the best...enough said.
__________________
__

pawcio is offline   Reply With Quote
Old 06-06-2013, 04:03 PM   #12
jabela
4th Gear Member
 
Join Date: Apr 2007
Location: Toronto, ON, Canada
Posts: 767
So what did bimmersport do to fix it?
__________________

2002 E46 325ci // 5spd // ISC N1 Coilovers
www.modernapothecary.ca
jabela is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 On

Forum Jump


All times are GMT -4. The time now is 11:31 PM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Maxbimmer Copyright 2001 - 2014