New Challenge: - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

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!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

Thread Tools Search this Thread Rate Thread Display Modes
Old 02-23-2013, 03:21 PM   #1
Registered User
Join Date: May 2012
Location: Virginia Beach
Posts: 473
My Ride: a dinosaur
New Challenge:

2005 325i

Replaced OEM battery 2 months ago.
Car refused to turn over on Tuesday, took 4 attempts.
First 3 attempts just a click, no signs of attempted ignition. All internal/external electronics work (lights, turn signals, radio, a/c etc).
Final attempt, ignition.
From Tuesday until this morning I was getting mixed starts, strong/normal and weak. The weak starts sounded like a dead battery would.

Decide I'll take it to dealership to see if its the starter/alternater since the battery is still new, if not I must have a power draw sonewhere.

This morning everything is going fine including 4 cold starts with no problem.. get to the stealership for a once over, and the car isn't turning over anymore.
I get a jump box and it turns over fine.
Must be a dead battery, must have power draw?
Go to Autozone and get/install brand new battery.
No start there, even after installation.
Jump box, couple weak attempts and then ignition. Maybe the battery had to charge from sitting in the shelf?
Get back over to dealership, no ignition. Just electronic starts like the initial issue.
Check battery terminals, everything is secure.
Maybe the new battery is already dead somehow?
Voltage reader: 900/750cold amps or something, more than enough power.
Attempt to start car.. Click, click, click.
Maybe its the starter? Tap that a couple times. Nothing.

Lead tech thinks its a bad starter.
Secondary tech grabs a jump box anyways..
Jump box again, clean start.
No one knows how/why...

My idea, problem:
The car isn't pulling from the battery in the rear, for whatever reason (help!)

My idea, probable cause:
Power is only being sent for ignition from the front battery terminal and after the car starts, power is being drawn from the battery.

Theres something happening between front and rear terminals thats causing this or the ECU isn't functioning properly?

Probable solution:
No idea..

Please help, thanks

Last edited by dcw242; 02-23-2013 at 03:37 PM.
dcw242 is offline   Reply With Quote
Ads by Google

Guests, get your FREE membership to remove this ad.

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Censor is OFF

All times are GMT -5. The time now is 11:12 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - VerticalScope Inc. All rights reserved.