MS3X-1.6 Sync loss @ 4K, high idle - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-14-2013, 11:28 PM   #21
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Quote:
Originally Posted by Braineack View Post
that's the mainboard harness. what about the expander?
Whoop wrong pic. Fixed
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Old 01-15-2013, 09:16 AM   #22
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okay and you said you ran them back to the fuel rail? or do they all just go back to the oem wiring harness?
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Old 01-16-2013, 12:40 AM   #23
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All but two run through the oem harness. I have the two extra going out to the fuel rail by them selves.
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Old 01-16-2013, 12:42 AM   #24
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You can kind've see them coming out of the single middle connector
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Old 01-16-2013, 09:26 AM   #25
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That should be sufficient, I dont even run extra grounds more than to the OEM ones myself.

Can you get a datalog and composite log of the loss of sync? that would really help to figure out the cause.

we can see if it's the cam signal, crank signal, or anything else...



edit: Oh I see you have already, I'll have to look when home.
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Old 01-16-2013, 09:39 AM   #26
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The composite log in post #4 doesn't show any sync problems.
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Old 01-16-2013, 03:35 PM   #27
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If it is intermittent, then it is most likely a loose ground or poor solder. I have seen a loose wire in the harness cause this.
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Old 01-16-2013, 10:52 PM   #28
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Quote:
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The composite log in post #4 doesn't show any sync problems.
probably because I uploaded the wrong log haha. Let's try this one.
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File Type: csv 2012-12-23_sync loss.csv (20.6 KB, 46 views)
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Old 01-17-2013, 09:23 AM   #29
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Quote:
Originally Posted by Oochi View Post
probably because I uploaded the wrong log haha. Let's try this one.
There are no sync problems in this log.
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Old 01-17-2013, 11:43 PM   #30
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Quote:
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There are no sync problems in this log.
Interesting. It shows a sync spike in megalog viewer HD for me. I'll try and make another log tomorrow if I get the chance.
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Old 01-19-2013, 11:50 AM   #31
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Here is where I grounded it
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Old 01-19-2013, 12:42 PM   #32
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yeah there's no sync loss on that composite loss, only at the very last data point when the log was stopped, but that's only because it didn't read the signals further.
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Old 01-19-2013, 03:12 PM   #33
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Next time it happens and you are logging hit <spacebar>, because that will put a mark in the log so we know specifically where to look.
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Old 01-19-2013, 05:18 PM   #34
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Quote:
Originally Posted by shuiend View Post
Next time it happens and you are logging hit <spacebar>, because that will put a mark in the log so we know specifically where to look.
I wish I read that before I did my logs like an hour ago :(

But here are some logs for you fine gents hope these are better

I also have a few new questions.
1. What do you all use for idle control? And, could you screenshot your settings? I am currently using PWM closed-loop, and it would idle way high because it was constantly pulling air through the IACV, so I capped both end and it idles normal, except really low during warm up. Low enough that it will die if I try to drive before it warms up some.

2. With my idle VE on, it idles around 10AFR, and with it off, it wants to idle over 18AFR. I'd like to know you all's settings with this as well. Is it just as simple as taking away fuel from the idle VE map?

3. More settings I would be ecstatic for you all to help me with: Acceleration enrichment. Also, it goes extremely lean when trying to cruise with little gas or just giving it little gas in general. It also bucks when I give it a little amount of gas. I will also attach a log of this.

I would love to supply any settings of mine that would help. I appreciate all of the help I pulled my ECU and brought it to school with me to check over the innards and fix my LEDs, which I somehow put in backwards
Attached Files
File Type: csv 2013-01-19_syncloss.csv (42.6 KB, 45 views)
File Type: msl 2013-01-19_syncloss.msl (54.1 KB, 51 views)
File Type: msl 2013-01-19_smallgas.msl (86.5 KB, 42 views)
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Old 02-01-2013, 07:34 PM   #35
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Has anyone had a chance to look at these? I'm about to open up the squirt this weekend and look around
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Old 02-03-2013, 12:08 AM   #36
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Took my MS apart today and hooked it up to the stim. Having weird problems with the tach input. Turning R56 until i get something and the tach signal go absolutely nuts. Data log says constant sync loss reason 38 (4g63). I also can't get any voltage above .17v on R54, turning R56. I am measuring voltage across the resistor right? Pos. probe on top leg and neg. probe on other leg of resistor?

Ignition settings:
Name:  Ignitionsettings_zps83eb5663.png
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Last edited by Oochi; 02-03-2013 at 12:27 AM.
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Old 02-03-2013, 09:34 AM   #37
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maybe the pot resistor is bad?

you should be watching the composite logger while doing this too. to see what signal is kicking out.
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Old 02-03-2013, 11:48 AM   #38
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Quote:
Originally Posted by Braineack View Post
maybe the pot resistor is bad?

you should be watching the composite logger while doing this too. to see what signal is kicking out.
I'm looking at the composite logger but again, idk what the heck I'm looking for. Just a bunch of lines going crazy. I don't have the stim for the expander card, could that be a problem possibility since the expander controls the cam input and such?
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Old 02-03-2013, 01:50 PM   #39
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you just need to send the second trigger into pin 32 of the db37 of ms3x.

then when you sync and turn the rpms up, you can see if the top green line drops off or the bottom blue line, then you know what resistor is causing the issue.
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Old 02-03-2013, 02:49 PM   #40
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I hope you are saying I can direct that in tuner studio and don't mean I have to mess with the harness :(
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