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 > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Thread Tools Search this Thread Rate Thread Display Modes
Old 02-21-2013, 11:39 PM   #1
Registered User
Join Date: Jan 2013
Location: Burnaby
Posts: 4
My Ride: 1999 323i
Ecu and tcu stalling issue

Ok so I have a 99 323i and i recently ha to replace the alt brushes and battery. Then the car started randomly stalling at stops. Sometimes turn right on other times wouldn't start for an hour or more. Took it to mechanic and he said fuel pump was shot. 500 bucks later I pick car up today and 3 blocks from shop it dies the same way as before.
The mechanic ran down and no codes but his diagnostic tool wouldn't talk to the car. He had noted that one of the control units under the hood was loose. We started playing with wires and we could get the mil light on and his tool talking and car would start. Let it go and car dies. No engine light. Play around and get engine light, car starts. Repeat several times.

Ok, so now he thinks the dme is having a connection problem. The control unit that has the blue hookups is the transmission unit, correct? It has the loose case and is mostly what he played with, but wires to the black ecu were being moved as well. Is the trans unit programmable on this car? I know the main ecu is not and has to be ordered from BMW Germany.
If it is it would save me a lot of hassle trying to solve the loose connection.
Also, would the tcu cause the mis-communication with the diagnostic tool? And prevent car from starting? Or stalling?
My_dance is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.

dme, ecu, stall, tcu

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 On
Censor is ON

All times are GMT -5. The time now is 03:18 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - 2016 performanceIX Inc - privacy policy - terms of use