Injector Power - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 03-20-2006, 10:40 PM   #1
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Mar 2005
Location: VT
Posts: 939
Total Cats: 0
Default Injector Power

Do those of you that use the stock harness use the injector power(5V) from the MS or the stock ECU. The stock wiring diagram for the 96 indicates that cutting the 5V to the Injectors will short out the EGR/TPS/MAF.

I had one very bad experience with the 5V system with a Stock ECU and would like to avoid another mishap...
Jefe is offline   Reply With Quote
Old 03-20-2006, 10:50 PM   #2
Junior Member
 
Join Date: Nov 2005
Location: Down Under
Posts: 252
Total Cats: 0
Default

Straight from the MS and no problems at all with it.
Aussie Driver is offline   Reply With Quote
Old 03-20-2006, 11:23 PM   #3
Junior Member
 
Join Date: Nov 2005
Location: Quebec, Canada
Posts: 47
Total Cats: 0
Default

Hello Jefe,

I'm not sure why you would want to cut the power to the injector.. Let the stock ECU feed the 5V to them. It is easier since you have no wire to add.

My MS is only dealing with the ground part. So you only need to cut the injectors ground and wire them to MS.

This way I only have the 4 injector ground wire to connect back to the stock ECU if any problem rise from the MS.
MiataMath is offline   Reply With Quote
Old 03-20-2006, 11:36 PM   #4
Senior Member
 
Join Date: Oct 2005
Location: Knoxville
Posts: 1,168
Total Cats: 0
Default

5V? Don't injectors use the same 12V power source as the MS? I just made a new harness for my injectors according to this:
http://www.megasquirt.info/ms2/v3ext_wiring.gif
Al Hounos is offline   Reply With Quote
Old 03-20-2006, 11:39 PM   #5
Junior Member
 
Join Date: Nov 2005
Location: Quebec, Canada
Posts: 47
Total Cats: 0
Default

You are right!! It is 12V.. My bad.. I meant I let the stock ECU feed them wathever voltage they want and only control the ground through MS.

I guess Jefe confuse me when he start with the 5V part
If you need 5v.. couldn't you just splice in any 5V source the Ecu is feeding his sensor?
MiataMath is offline   Reply With Quote
Old 03-20-2006, 11:42 PM   #6
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Mar 2005
Location: VT
Posts: 939
Total Cats: 0
Default

MiataMath,
Thanks!
That's how I was going to try it first, I can't ever ditch the stock ECU because I live in a wanna be CARB state and have to keep my OBD II ...

Aussie,
If I could entirely ditch the stock ecu like you did I would, but since I have to keep it, KISS.

My powercard only uses the injector grounds as well...
Jefe is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 12-13-2017 10:04 PM
Changing from 460cc to flow force 610cc in diypnp 90 Turbo MEGAsquirt 19 10-19-2015 04:23 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM


Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:25 AM.