03 Suzuki sv 1000 front cylinder has no negetive pulse coming from the ecm - SV1000 Portal
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 8 (permalink) Old 19th August 2019, 04:54 AM Thread Starter
L-Plate Rider
 
Join Date: Aug 2019
Posts: 4
03 Suzuki sv 1000 front cylinder has no negetive pulse coming from the ecm

I've recently done a motor swap for my buddies 03 Suzuki sv1000 everything has gone great except the fact that it's only running half of the motor hasn't pulled my multimeter out checked all kinds of things and what I've come to the conclusion of is that the ECM or ECU is not sending the negative pulse through the black wire to the right side coil pack which runs the front cylinder of the bike it has the positive signal but no negative pulse coming from computer I'm stumped I don't know what to do. I've put multimeter to the camshaft position sensor, normal readings and when I put the multimeter on ohms test the resistance on a blue white wire coming from the ECU/ECM I'm showing normal resistance and voltage, but the black wire has zero resistance and 0 voltage is his ECU or ECM bad
Motomaniac is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 19th August 2019, 05:19 AM
Bike curious
 
oldbaldsob's Avatar
 
Join Date: May 2005
 ♂ United States
Springfield, MOFO
Posts: 8,497
Garage



There was a recent thread about a member who swapped motors and couldn't get the rear cylinder to fire continuously. Turned out he had a bad coil. Here is page 2 of that thread where he discovers the issue: https://www.sv-portal.com/forums/5-t...post1852322455


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
oldbaldsob is offline  
post #3 of 8 (permalink) Old 19th August 2019, 06:45 AM
Hardcore Biker
 
Missing Link's Avatar
 
Join Date: Dec 2017
 ♂ Australia
Queensland, Orstraylya
Posts: 530
Garage
Never tired this before, but, can you temporarily swap the coils over and see if the problem follows ? If so, its the coil...

Not sure if the plug lead will make it along its normal route, so a shortcut for testing purposes might be needed

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
.
.
2003 Copper SV1000S
Repainted Ford PE (Petroleum Mica)
Yoshi 2:1 collectors and Arrow titanium can...
One owner..... 290,000kms and counting...
Missing Link is offline  
 
post #4 of 8 (permalink) Old 19th August 2019, 07:14 PM Thread Starter
L-Plate Rider
 
Join Date: Aug 2019
Posts: 4
Yes I just tried it I put the blue and white which is the negative for the rear cylinder head call it coil pack 1 up to coil pack 2, and left the positive wire the same because they are actually the same wire it's only the negative wire that differs and got shocked for sure from the coil pack lead now when I put it in the front cylinder it wants to start but misfires badly because it's timed 4 coil pack 1 so coil pack 2 is good. When I hook coil pack 2 back up to its original negative wire which is the black one I'm getting no results again coming off the ECU or ECM I'm getting nothing off of that negative wire no negative pulse that I need
Motomaniac is offline  
post #5 of 8 (permalink) Old 19th August 2019, 07:51 PM Thread Starter
L-Plate Rider
 
Join Date: Aug 2019
Posts: 4
Okay so digging a little deeper in the Forum and the amazing Google search engine, I found that I took the motor out of a 2003 Suzuki sv1000, and put it into a 2003 Suzuki sv1000s. Pretty much everything on it is the same thing bearing Styles different weights different and positioning is different of seats and pegs but my problem is as I stated before I'm getting no spark for the front cylinder now when I put the ECU or ECM in from the Suzuki sv1000 that I took it out of I get no start at all and the wiring harness is so hacked from the sv1000 that I can't even attempt to use it
Motomaniac is offline  
post #6 of 8 (permalink) Old 20th August 2019, 05:23 AM
Hardcore Biker
 
Missing Link's Avatar
 
Join Date: Dec 2017
 ♂ Australia
Queensland, Orstraylya
Posts: 530
Garage
So, its definetly a year for year change of ECU ? As in, 2003 to 2003 ?

Also, is the ECU you have got from the same country ? BEcause of differing emmisions laws and other ridiculous shit, the pin placings can be different.....why? who knows....but i does matter....

Check the loom that the ECU came from, find the coil negatives on it, and see if they correspond to your in-situ loom.... As long as you dont have to displace another wire to do so, unlock the bikes plug and pluck that wire and shift it to the correct position for the donor ECU.....

If it requires moving other wires around as well, then its a sit-down and scratch your hair out job... HA HA

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
.
.
2003 Copper SV1000S
Repainted Ford PE (Petroleum Mica)
Yoshi 2:1 collectors and Arrow titanium can...
One owner..... 290,000kms and counting...
Missing Link is offline  
post #7 of 8 (permalink) Old 27th August 2019, 09:19 PM Thread Starter
L-Plate Rider
 
Join Date: Aug 2019
Posts: 4
Thank you I'm gonna check it out I'll update you if it works
Motomaniac is offline  
post #8 of 8 (permalink) Old 28th August 2019, 01:02 AM
Hardcore Biker
 
Missing Link's Avatar
 
Join Date: Dec 2017
 ♂ Australia
Queensland, Orstraylya
Posts: 530
Garage
Cool....

The part number on the ECM/ECU will give clues as to its original use..... if its the same as yours, then it should be the same wiring.... But, if the last digits are different, then its looky looky time

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
.
.
2003 Copper SV1000S
Repainted Ford PE (Petroleum Mica)
Yoshi 2:1 collectors and Arrow titanium can...
One owner..... 290,000kms and counting...
Missing Link is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SV1000 Portal forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
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:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



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 Off
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome