trying to get my car started with the new MS2 - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-02-2011, 04:06 AM   #21
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I'll take a picture of what components need to be where and you can double check the board for errors.
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Old 08-02-2011, 01:33 PM   #22
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Thanks Dimitris, I think that's what I need.
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Old 08-04-2011, 07:46 PM   #23
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I've adjusted afterstart enrichment a bit and it idles much more smoothly from cold (it had been stalling after a couple seconds) and using VE live to smooth out the running. It still bucks and stumbles some at low speed rpms, but less. Working on it.

Still would like to fix the fuel pump circuit.
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Old 08-06-2011, 09:37 AM   #24
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Pm me your mailing address and I'll send you the components you need to change.
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Old 08-22-2011, 01:07 AM   #25
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I'm back from vacation.

Here's some photos of the MS2V3.

Perhaps you could point out anything amiss? Maybe point to the offending transistor? Not the greatest pictures, but I can take more if needed.
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trying to get my car started with the new MS2-imag0110%5B1%5D.jpg   trying to get my car started with the new MS2-imag0111%5B1%5D.jpg   trying to get my car started with the new MS2-imag0113%5B1%5D.jpg  
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Old 08-22-2011, 04:56 AM   #26
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I need a better pic of the the area just behind the big black disc-like component on the second picture.
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Old 08-22-2011, 12:10 PM   #27
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Moar:
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trying to get my car started with the new MS2-imag0124%5B1%5D.jpg   trying to get my car started with the new MS2-imag0123%5B1%5D.jpg  
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Old 08-22-2011, 12:34 PM   #28
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And:
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trying to get my car started with the new MS2-imag0126%5B1%5D.jpg   trying to get my car started with the new MS2-imag0125%5B1%5D.jpg  
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Old 08-22-2011, 12:45 PM   #29
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Everything seems to be in order...have a look at the two black transistors in there (labelled Q2 and Q19). Q2 should be a "ZTX450" and Q19 should be a "2N3904".
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Old 08-22-2011, 12:55 PM   #30
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Oh wait...this resistor here is probably the culprit:



Replace it with a 1.0Ohm (one ohm), 1/2W resistor from Radio Shack (or temporarily remove it and replace it with a wire to test) and it should work.
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Old 08-22-2011, 01:00 PM   #31
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looks like 270 in there. why you trolling!
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Old 08-22-2011, 01:02 PM   #32
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Which would explain why it would work on the stim (which as a 30-70R relay) but not in the actual car.
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Old 08-22-2011, 02:44 PM   #33
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OK!

So, how hard would it be to switch the coil outputs while I'm at it?
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Old 08-22-2011, 02:47 PM   #34
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swap the green and brown wires on the bottom of the board. why would you need to?
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Old 08-22-2011, 02:49 PM   #35
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well...just so I don't get confused if I take off the new unit in the future and go back to stock. not important otherwise.
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Old 08-22-2011, 02:51 PM   #36
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did you have to swap your coils to get running or something?
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Old 08-22-2011, 03:16 PM   #37
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Yes. Coil output is reversed on the megasquirt, and the fuel pump didn't run, so it took a while for me to get it right as I would work on it a little while off and on when I had time, then put the OEM computer back in as it's the DD, etc. I meant to get this going a long time ago, so it will wait until colder weather for me to start working on the turbo hardware--I just like to drive the Miata in good weather, and my daughter is driving my Acura until school starts anyway.
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Old 08-22-2011, 03:18 PM   #38
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the MS outputs look okay, it must be reveresed on the harness if anything.
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Old 08-22-2011, 05:44 PM   #39
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Is that 1k Ohm, 1/2 Watt or 1 Ohm 1/2 Watt Resistor?
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Old 08-22-2011, 06:04 PM   #40
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Good read. Good luck to getting all straight, there are some very knowledgable moderators up here
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