Electronic Root Cause - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-08-2011, 07:37 AM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,206
Wiki Edits: 0

Thanks: 202
Thanked 256 Times in 238 Posts
Electronic Root Cause

We determined the Ecm was bad after we discovered the secondary Ignition coil was bad. This is on a 98 B 2500 Mazda (ford) pickup. The secondary Ignition coil wasnt firing ,and we determined the ECM is why it wasnt firing. BUT The secondary ignition coil had an internal Short that was leaking High voltage and the picture is where all the voltage was going.
The coil was bad and was the root cause here.
Allways be sure when replacing an ECM that you find the cause. Just thought you all might like this.
This applies to all vehicles a well.
The check engine light had been on and off for a few months he said and new plugs didnt help.Thats when they brought it to us.This is a good example of why you should have your check engine light looked at ASAP when it comes on. Coils are cheap, ECM's ....... Not so much.
Attached Thumbnails
Click image for larger version

Name:	Picture.jpg
Views:	66
Size:	45.3 KB
ID:	52510  

    Advertisement

Last edited by latech; 02-08-2011 at 07:47 AM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-08-2011, 08:19 AM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,206
Wiki Edits: 0

Thanks: 202
Thanked 256 Times in 238 Posts
!!!!!!!!!!!!!!!!!!!!!!!!!!
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-08-2011, 12:14 PM
pepi's Avatar
How’s that hopey-changey thing
 
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
I am not so sure that it took very much time to cause that. Fried solid state components happen fast. Not many second chances.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-08-2011, 12:32 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,206
Wiki Edits: 0

Thanks: 202
Thanked 256 Times in 238 Posts
Yeah sometimes it can , I have a feeling this would not have happened if it had been checked out properly at first when it started acting up.
Look at the charcoal on the IC that didnt happen after a couple jolts. That cooked for a while.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-08-2011, 12:53 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,206
Wiki Edits: 0

Thanks: 202
Thanked 256 Times in 238 Posts
But one good jolt can defenitley take one out.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-08-2011, 01:16 PM
pepi's Avatar
How’s that hopey-changey thing
 
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
ya start cooking those things the specs start going all over the place. Changes the game.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-08-2011, 01:20 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,206
Wiki Edits: 0

Thanks: 202
Thanked 256 Times in 238 Posts
Thats the crazy part. There were only a code stored for the coil primary circuit.Other than that the data stream looked normal.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-08-2011, 01:40 PM
pepi's Avatar
How’s that hopey-changey thing
 
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
It might not produce a different set of codes, just the way the parts play together. I would guess that a code is the result of a hit on the channel it monitors, and therefore it would only indicate failure of the monitored item. What happen first the ECM failure or the coil, I do not believe the ECM would be smart enough to give you that information.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-08-2011, 04:02 PM
vicrod's Avatar
life is a ride
 

Last journal entry: 2014
Last photo:
Join Date: Nov 2005
Location: Telford, PA
Age: 71
Posts: 1,324
Wiki Edits: 0

Thanks: 0
Thanked 56 Times in 52 Posts
This is classic example of "my design is correct don't bother me" .
The nerds that design this crap should be made to work on it for 2 years to make sure it's dependable.
I know, it would cost to much, bla, bla, bla.
It seems that no attention is paid to what we call the "fault modes" or the "what ifs". Not to mention redundancy.
Toyota's recent issues are an example.
Or maybe they do have an interest in getting owners into the dealer's repair shops. But that would giving them to much credit.
Ahh, now I fell better.

vicrod
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 02-08-2011, 04:45 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,206
Wiki Edits: 0

Thanks: 202
Thanked 256 Times in 238 Posts
Quote:
Originally Posted by vicrod
This is classic example of "my design is correct don't bother me" .
The nerds that design this crap should be made to work on it for 2 years to make sure it's dependable.
I know, it would cost to much, bla, bla, bla.
It seems that no attention is paid to what we call the "fault modes" or the "what ifs". Not to mention redundancy.
Toyota's recent issues are an example.
Or maybe they do have an interest in getting owners into the dealer's repair shops. But that would giving them to much credit.
Ahh, now I fell better.

vicrod
Hee hee hee.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 02-08-2011, 04:47 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,206
Wiki Edits: 0

Thanks: 202
Thanked 256 Times in 238 Posts
The NHTSA determined that there were no electronic malfunctions causing the sudden acceleration in Toyota vehicles.
Those people who were crashing all worked for ford. LOL
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 02-08-2011, 05:05 PM
vicrod's Avatar
life is a ride
 

Last journal entry: 2014
Last photo:
Join Date: Nov 2005
Location: Telford, PA
Age: 71
Posts: 1,324
Wiki Edits: 0

Thanks: 0
Thanked 56 Times in 52 Posts
Yea, I head that. Oh goody its not the computer that killed those people.
So what caused the problems?
I'm think we may never know.
And it seems, there is no going back to simple.

vicrod
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 02-08-2011, 05:06 PM
pepi's Avatar
How’s that hopey-changey thing
 
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
That is also called beta or field testing ...

As to the sudden acceleration, stupid drivers trying to avoid responsibility. If you work on machines long enough, and I do not care what type of machine. The one truism is people always blame the machine, they make up stuff to point that finger at others.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 02-08-2011, 05:09 PM
pepi's Avatar
How’s that hopey-changey thing
 
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by vicrod
Yea, I head that. Oh goody its not the computer that killed those people.
So what caused the problems?
I'm think we may never know.
And it seems, there is no going back to simple.

vicrod

May I say drive by wire ........ what sense does that make?
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 02-08-2011, 05:18 PM
vicrod's Avatar
life is a ride
 

Last journal entry: 2014
Last photo:
Join Date: Nov 2005
Location: Telford, PA
Age: 71
Posts: 1,324
Wiki Edits: 0

Thanks: 0
Thanked 56 Times in 52 Posts
A sign of the times. We accept mediocrity as the new normal.
One example is cell phones.
Put it out on the market and the majority won't give a crap if the things only work X% of the time. Company makes profit and that's all that matters. The "small" people will buy it and be quiet.
Now, hotrods, that's another thing. !!!!!!

vicrod
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Convert Electronic Q-Jet to Non-Electronic cobalt327 Engine 13 10-31-2009 11:22 PM
Root Beer Float .... 57Corvette Hot Rod Art 14 09-22-2009 09:55 AM
root type supercharger jwag Engine 1 03-29-2006 04:10 PM
Here's a root of the problem. machine shop tom Hotrodders' Lounge 8 11-09-2004 12:47 AM
TWIN Root superchargers D M N Engine 19 07-13-2003 08:49 AM


All times are GMT -6. The time now is 11:50 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.