Running sequnetial injection & ignition through my MS3X
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MUHAHAHA.
fuel injector harness modded from batch to 4 separate inputs, with the ability to go back to batch if I ever need to plug in an inferior MS to my car.
Onto my COP harness...
fuel injector harness modded from batch to 4 separate inputs, with the ability to go back to batch if I ever need to plug in an inferior MS to my car.
Onto my COP harness...
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I'm doing it cause I just picked up the MS3X expansion card. I didn't want to have to build additional drivers for everything, so for hardware it's pretty much just plug and play. As far as wiring, I need to run 4 additional wires to my engine bay (2 for each) and modify my MS batch harness...
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Here's the fuel injector harness:
![](http://www.boostedmiata.com/gallery2/d/13067-2/ms3x+052_001.JPG)
added two inputs so all four channels have an individual input, then added a connector so I can go back to batch if necessary.
reworked COP harness:
![](http://www.boostedmiata.com/gallery2/d/13012-2/ms3x+057.JPG)
same thing, all four cops are on four different inputs, connector that can bring them back to wasted. I did an awful job building it the first time after tearing it apart, I replaced the connectors I build with factory pigtails.
MS3X Card:
![](http://www.boostedmiata.com/gallery2/d/13077-2/ms3x+059.JPG)
![](http://www.boostedmiata.com/gallery2/d/13082-2/ms3x+062.JPG)
![](http://www.boostedmiata.com/gallery2/d/13102-2/ms3x+066.JPG)
Then to reward myself:
added two inputs so all four channels have an individual input, then added a connector so I can go back to batch if necessary.
reworked COP harness:
same thing, all four cops are on four different inputs, connector that can bring them back to wasted. I did an awful job building it the first time after tearing it apart, I replaced the connectors I build with factory pigtails.
MS3X Card:
Then to reward myself:
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Unsuccessful first attempt. I'm unsure if I have a wiring issue or setting issue. I'm sure I have sequence correct and the injectors wired the correct firing order. I'll have to test one at a time later, it's 97*F out and feels like 105*F so I'm done for the day, I'll mess around tomorrow in my parking garage.
EDIT: Went back over the documentation and I did in fact wire the coils up wrong. I have cylinders 1-2-3-4 as A-B-C-D where it needs to be A-C-D-B. I think that should solve the issue.
EDIT: Went back over the documentation and I did in fact wire the coils up wrong. I have cylinders 1-2-3-4 as A-B-C-D where it needs to be A-C-D-B. I think that should solve the issue.
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There are more benefits to sequential fuel than ignition. You can run larger injectors and maintain a steady lean idle is the big win, mild improvement in town driving mpg and smoothness too.
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There are more benefits to sequential fuel than ignition. You can run larger injectors and maintain a steady lean idle is the big win, mild improvement in town driving mpg and smoothness too.
Are you bringing cam in on JS10 or through the 3X?
At least I know my jumper connectors work to bring my harnesses back to batch/wasted. So that's cool.
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If you've already built out a second conditioning circuit, then probably not for this application. I would expect the conditioning circuit in the Expander to be a bit better than a simple jumper and pull up to JS10.
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yep, ran seq. fuel only this morning. Was able to reduce the pulse width at idle a good amount, with a/c on from 2.4ms to 2.0ms. Throttle response was improved which was surprising because my EAE is already tuned very well. I'll get the spark firing order solved at lunch.
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Infact I have precisely zero AE atm in the hunt for an irritating half misfire, and throttle response is virtually identical, I've half a mind to leave it off completely...