MS - Stock question
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I am putting MS on my daily driver in prep for a turbo. If I wire the MS to the stock ECU harness, leaving the stock plug, can I just switch back and forth between the two ECUs until I get the MS tuned, or will that mess things up?
If I understand correctly, it should be fine so long as I only have one ECU plugged in at a time, and I'm using all the stock sensors. (All this is until I get the turbo on, of course. Once I do that there is no turning back)
I only have the one car, and if I need to go somewhere before my tuning is complete, it would be nice to be able to do that. If not, I'll have to borrow somebody else's car.
-Corey
If I understand correctly, it should be fine so long as I only have one ECU plugged in at a time, and I'm using all the stock sensors. (All this is until I get the turbo on, of course. Once I do that there is no turning back)
I only have the one car, and if I need to go somewhere before my tuning is complete, it would be nice to be able to do that. If not, I'll have to borrow somebody else's car.
-Corey
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I only have the one car, and if I need to go somewhere before my tuning is complete, it would be nice to be able to do that. If not, I'll have to borrow somebody else's car.
![](http://www.boostedmiata.com/MS/harness/direct_db37.jpg)
The other option, which would make the in-car portion of the wiring even simpler and cost only a small amount extra, would be to build yourself a plug-n-play harness as described by Braineack in This Thread.
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