Parallel-wiring MS
03-29-2007, 10:44 PM
#1
Former Vendor
Thread Starter
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,099
Parallel-wiring MS
OK, this is a total newbie thread, but I've tried searching around and a lot of the answers are a bit cryptic. I'm pretty sure some of you have used vampire clips to tap into the OEM inputs and then used bullet connectors to replace the stock outputs on the ECU to allow the MS to just control spark, fuel, and idle. Can anyone post pics of their setup? Is it easier to order a Boomslang harness and then tap into that rather than hack up the OEM wiring? Am I on the right track? I am looking to make this sucker as plug and play as possible for as cheap as possible.
Reply
0
0
03-29-2007, 10:48 PM
#2
Just unhook the outputs for the injectors and the spark and plug MS into them. I personally would let the stock ecu do the idle if you are going to run parallel.
I made my own harness from ecu connectors, but it is identical to the boomslang with my own MS harness spliced into it. I made it because I didnt want to cut the stock harness. So fuel and spark are really the only things you NEED.
I made my own harness from ecu connectors, but it is identical to the boomslang with my own MS harness spliced into it. I made it because I didnt want to cut the stock harness. So fuel and spark are really the only things you NEED.
Reply
0
0
03-29-2007, 10:52 PM
#3
Supporting Vendor
iTrader: (33)
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,659
Total Cats: 134
You can pull wires out of the stock harness terminal. Each terminal has 2 hinged doors, one top one bottom. The release latches are on the sides, slip your thumbnail in, and the hinge will open to reveal the terminal pins. Use an opened paperclip to push the tab on a terminal pin, and the wire will slide out. When you have all the wires you need removed, close the hinged door.
If you ever need to go back to stock, you open the door up again, and slip the wire back in. It's kind of a PITA to get the pin to catch into place again. Much easier to remove it than replace it.
Flyin Miata has terminal pins if you call them.
If you ever need to go back to stock, you open the door up again, and slip the wire back in. It's kind of a PITA to get the pin to catch into place again. Much easier to remove it than replace it.
Flyin Miata has terminal pins if you call them.
Reply
0
0
03-29-2007, 11:05 PM
#4
You can pull wires out of the stock harness terminal. Each terminal has 2 hinged doors, one top one bottom. The release latches are on the sides, slip your thumbnail in, and the hinge will open to reveal the terminal pins. Use an opened paperclip to push the tab on a terminal pin, and the wire will slide out. When you have all the wires you need removed, close the hinged door.
If you ever need to go back to stock, you open the door up again, and slip the wire back in. It's kind of a PITA to get the pin to catch into place again. Much easier to remove it than replace it.
Flyin Miata has terminal pins if you call them.
If you ever need to go back to stock, you open the door up again, and slip the wire back in. It's kind of a PITA to get the pin to catch into place again. Much easier to remove it than replace it.
Flyin Miata has terminal pins if you call them.
It will cost you about $5 in wire connectors to hook up MS. If that.
Reply
0
0
03-29-2007, 11:11 PM
#5
Senior Member
Join Date: Oct 2005
Location: Knoxville
Posts: 1,168
Total Cats: 0
damn, i think i'm the only one who just hacked up and wired in straight to my stock wiring harness. there's a sweet picture in my garage that gives you an idea how fun it was.
but my cas and injectors and iat sensor have their own harnesses.
but my cas and injectors and iat sensor have their own harnesses.
Reply
0
0
03-29-2007, 11:12 PM
#6
Former Vendor
Thread Starter
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,099
Awesome. Just to clarify, aside from the pre-modded MS, the GM IAT sensor, and a serial cable, do I need anything else (aside from wire and connectors and crap)? I don't think I need a Stim because I'm not doing anything except hooking it up.
Reply
0
0
03-29-2007, 11:43 PM
#8
I can lend you a STIM if you want to build your own and don't want to buy one. I'm pretty sure I'll be able to spare it in the next few weeks. I would recommend buying your own but mine wasn't much help. Once I knew MS was working I haven't plugged it back in since then.
Al, I did chop up my stock harness, cut the wires and crimped on bullet connectors. The whole boomslang patch harness just makes things easy/pretty/easily reversible to perfectly stock.
On the topic of wiring and harnesses does it matter where i ground my CAS seeing how I had to make my own harness for it.
Al, I did chop up my stock harness, cut the wires and crimped on bullet connectors. The whole boomslang patch harness just makes things easy/pretty/easily reversible to perfectly stock.
On the topic of wiring and harnesses does it matter where i ground my CAS seeing how I had to make my own harness for it.
Reply
0
0
03-31-2007, 07:03 PM
#11
Junior Member
Join Date: Apr 2006
Location: San Antonio, TX
Posts: 93
Total Cats: 0
Good luck with your Megasquirt. Cool stuff.
Reply
0
0
04-01-2007, 12:41 PM
#13
Elite Member
iTrader: (9)
Join Date: Aug 2006
Location: Concord, North Carolina
Posts: 4,160
Total Cats: 6
damn guys...I wish I knew wtf was going on lol, I need to tear into the stock ECU and figure out the best way to wire it...I def can not have a bunch of wires like that...x.X
Reply
0
0
