EMS-4 12+1 and sequential ignition on MSM - first start help - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-17-2016, 05:28 PM   #1
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Default EMS-4 12+1 and sequential ignition on MSM - first start help

Trying to get my '04 MSM started for the first time and not sure what I'm doing wrong.

EMS-4
Boomslang Harness
Fab9Tuning 12+1 trigger wheel
Fab9Tuning COP (Wired for sequential, coil # matches cylinder #)

Couple of screen shots and cal attached
Attached Thumbnails
EMS-4 12+1 and sequential ignition on MSM - first start help-phase.jpg   EMS-4 12+1 and sequential ignition on MSM - first start help-pickups.jpg  
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File Type: zip 20161601.AEM20.01V24.zip (1.9 KB, 3 views)
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Old 01-17-2016, 08:42 PM   #2
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Fab9 not able to offer support?
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Old 01-21-2016, 01:44 AM   #3
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Bryan sent me a base map. I've fixed the backfires, it now stumbles when cranking. Not sure what to adjust next, minor adjustments to the lower left of the fuel map have some effect. I think I wasn't dumping enough fuel previously.

If anyone has some tips on what I should look at next, let me know. Ideally I want to learn this ECU in detail and street tune myself but satisfied if I can at least get it to safely drive to a tuner.
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Old 01-21-2016, 09:20 AM   #4
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12+1 installed backwards??

I had issues when I was using only a older 12tooth wheel and had to buy a 12+1 for it to work properly.
I may have a map sitting on my computer at home...If you're still having issues tonight I'll grab it for you.
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Old 01-21-2016, 01:29 PM   #5
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I thought I had it on backwards but I just had my phasing wrong, causing backfiring. I figured out that part, no more back fires and it tries to start. I'll take MAPs from any running 12+1 setup to compare my numbers against.
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Old 01-21-2016, 02:46 PM   #6
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Are you using the OE Cam Angle Sensor or did you modify it? In order to get my EMS4 up I had to shave one of the two tangs off the CAS (inside the housing).

I also had to isolate the IACV circuit - It was generating noise that interfered with the Crank sensor signal and that resulted in a problem similar to what you are experiencing. I believe you can unplug the IACV and see if you can get it to start.
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Old 01-21-2016, 11:34 PM   #7
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This is on an MSM, CAS is a magnetic sensor on the intake cam gear not a CAS on the back of the exhaust cam.

I have tried unplugging my IAC, doesn't seem to have any effect. Just considered the fact that the gas in the car is a year old, so I added 5 gallons of fresh 93 octane and waiting for the battery to recharge. Thinking I might also turn my idle screw up a small amount.
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Old 01-22-2016, 12:12 AM   #8
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Do these look right?

If I'm reading that correctly, my injectors are firing after the coil for each cylinder which certain isn't right.
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EMS-4 12+1 and sequential ignition on MSM - first start help-image.jpeg  
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Old 01-22-2016, 01:00 AM   #9
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I started over with the original Cal from Fab9 and these look better. This map was setup for 1000cc injectors so I need to lower the fueling and see how it goes.
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Old 01-24-2016, 07:46 PM   #10
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Finally got it started! Idled for about 10 minutes, came up 180 and then suddenly shutoff and hasn't started again over the last couple of hours. It's tries but doesn't quite get there. Letting it sit for a bit in case it's flooded.
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Old 01-28-2016, 02:08 AM   #11
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Finally got it running, idling decently, drivable. Still have a few issues. The stock ECU is doing alternator control and it works fine every time I start and idle it in the garage but anytime I go for a drive around the block it starts running on battery. I'll post my CAL later.

Not getting a VSS signal, going to e-mail boomslang and ask what it's wired to in the factory harness.

IAC is buzzing, appears to be working well but need to play with frequencies to quiet it down.

Finally, I don't think the EBC is closing with the settings I have. Looks like I'm only getting to waste gate pressure under boost.
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Old 01-28-2016, 11:38 AM   #12
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too bad 95% of the members here run MS so we can really provide help.
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