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Megasquirt using stock harness (S5)?

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Old 07-12-06, 08:00 AM
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using stock harness (S5)?

Is it possible to wire up a harness adapter, or get one somewhere, so that you can plug the MS into the stock harness?

also, are there any problems with using the stock harness?
Old 07-12-06, 08:22 AM
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If your stock harness is not broken, then there is no problem using it. Tofuball and I did that for months before we built his new harness.

Right now there is no adapter available, so you would have to wire one up yourself.

Ken
Old 07-12-06, 11:58 AM
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i think it is fine. i don't get any error codes from the ECU about disconnected sensors and what not.
i just want to get the MS built and installed as soon as possible, and then worry about doing a new harness later.

so i guess i basically just have to take the ECU pinout from the FSM and work from there?
i might have some more questions once i actually get around to this, and i will post them here.

thanks
Old 07-13-06, 07:13 AM
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that's what I did on tofuball's 'vert.
Old 07-14-06, 05:45 PM
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I built an adapter harness for my S4 NA. It was not to difficult, spent more time bothering Muythaibxr with questions than just about anything else
I will be getting a "second Chance" at building an adapter harness as I`ve agreed to buy a TII. I`ll be flying to Wisconsin next weekend to pick it up and drive back to Michigan.
Yea!!! TII
Old 07-21-06, 08:05 AM
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1) Is getting a spare ECU and ripping the connector off that the easiest way to make an "adapter". I guess i have to find an S5 ECU? or is there some place i can get the connectors themselves, or another way to do this?

2) what stock sensors need to be removed? also, i don't mind running the AFM for now, however is there a better way to go with using a MAP sensor (don't know if just the stock one will work)?
Old 07-21-06, 08:34 AM
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The AFM basically won't do anything... it'll just sit there.

The MS has a built-in MAP sensor, you should use that.

Building an adapter will require you to steal a connector from a stock ECU.
Old 07-21-06, 09:37 AM
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Originally Posted by muythaibxr
Building an adapter will require you to steal a connector from a stock ECU.
Connectors (at least it's multiple connectors for the S4)
Old 07-22-06, 07:11 AM
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no, the ECU only has one connector....

If he's going to be building the other side... the harness side as well, he'll need multiple connectors.

But my adapters have a db37 on one side, and a connector from a stock ecu on the other, and only one is "stolen" from a stock ecu.
Old 07-22-06, 04:08 PM
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???
S4 harness
According to my records:
  • CAS on 1st connector
  • IAT, CLT, TPS, BAC on 2nd connector
  • +12, INJ on 3rd connector
Old 07-22-06, 04:12 PM
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it is one piece that has 3 ports to accept connectors
Old 07-22-06, 06:29 PM
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yeah, 3 connectors on the harness side, one combined connector on the ECU.
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