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Old 07-04-2015, 02:06 PM   #21
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Sorry, I had this confused with another unit where I replaced the additional FET for Cylinder 2 on a DIYPNP recently.

Landrew just had an issue with his DIYPNP where injector driver #1 failed on the actual microsquirt board. here's the thread: https://www.miataturbo.net/megasquir...no-fuel-84960/

But weren't you having the same issue on the MSPNP2? or you think it was the TPS?

I dont really see anything in the tune, but things can get weird if you dont calibrate the: AFR, TPS, CLT, and AIT after a reflash if the settings didn't get saved.

Last edited by Braineack; 07-04-2015 at 02:22 PM.
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Old 07-04-2015, 02:42 PM   #22
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Braineack I'm sure you see a lot of different repairs so I understand. I did not like the MSpnp for lots of reasons (could not get wideband to sync/ stay powered even though it was wired in correctly) but same thing with tps and IAT, both were not operable. And a lot of the settings in the "base tune" were completely different than the settings in my diypnp. I can't remember perfect examples, but almost everything in the fuel/igniton settings did not match at all. I think I even tried to copy and paste the settings from the old tune to the new one...... which is where I believe I brought the problem along again. lol (especially everything in the ignition settings/wheel decoder) Those were different in almost every way.

When you received my ECU, you said everything was functional, and all you did was update the firmware. And it ran fine for a month. I went all over the place, even 4 hour drives and it didn't miss a beat. It was at random one day (3 weeks after you sent it back to me) that it faulted into running 3 cylinders again.

I did calibrate my IAT, wideband and tps to work now. CLT however, I did not think that needed to be changed. I know my "calibrations" did not save during the reflash.

What should I set the CLT to?
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Old 07-05-2015, 02:04 PM   #23
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Nevermind on the CLT values. I found them. So more inquiries here:

If using the same trigger angle from previous tune, do I need to "sync timing" again with a timing light?

Could this be the cause of my "not synced" light in tunerstudio?


Today in my opinion will be my last day trying to get it running with megasquirt and boost. If not, then the whole kit will be coming off. I'll put my obx header on and just drive on the stock ECU. From time to time I'll swap in the megasquirt and see if I can't figure it out while the car is N/A, but I'd rather figure this out while the kit is on.

The other time crunch I have is a decent car meet going on this Saturday. I wanted to show up there with all the goodies in the car, but it will be a little disheartening to show up there with a project I've given up on.

Nothing (in theory) has changed on the car since I put the megasquirt and kit on back in the fall of 2011. It is beyond me what could have happened to cause something that almost seems impossible being that the coil pack drives 2 wires and when swapped around it still refuses to fire cylinder 1 but cylinder 4 is still getting spark on the fly.

/end rant

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Old 07-05-2015, 09:33 PM   #24
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Okay update*

Removed stock ecu, unlplugged maf, left stock intake attched, plugged in my diypnp and Input CLT values. Fired her up and she was running all 4....... Drove the car 15 minutes back to my garage and installed my intercooler and cold side piping and IAT. !!!

Started her up and everything was a go. 30 seconds down the road, car went into 3 cylinders, out of frustration I put my foot to the floor and it felt and sounded like **** but top end she came to life! Boost and 4cylinders happened. And it has stayed this way the remainder of the day.

I'm still getting "not synced" in tunerstudio.

So why does the problem go under full load and clear up.........? This is the hardest trial and error I've gone through in life lol
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Old 07-06-2015, 09:34 AM   #25
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take a composite log. need to click the diagnostics tab then save to file.

record a log for a few minutes while it's showing "not synced"

i have a feeling it's just some oddness in your TS, the car should run if it's not synced.


is it possible you have bad oem wiring? can you make the clyinder drop out of you jiggle the **** out of the connector/wiring at the ecu?

can you take a regular data log and hit space bar the second you feel the cylinder stop firing? I want to see if the MS is doing something funny at that point.
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Old 07-13-2015, 01:01 PM   #26
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Braineack, sorry I was out of town for a car meet this past weekend. but here is my response:

Yes TS is reporting not synced the entire time it is plugged in. I believe you meant to say "not run if it is not synced". Which got me to thinking (because I had seen your response before the weekend and glad I did) I have not plugged back in my laptop since I calibrated CLT and started it up again.

I am too concerned to plug the laptop back in, in fear that something is corrupt when they are communicating. But at the same time, I don't want to believe that scenario because the very first time this happened with a full time 3 cylinder running mode, it was not hooked up to the laptop at that moment or months before then.

There is not any wiring that I haven't pried at or "jiggled" in hopes there was a short or a crimp somewhere. The harness and every connector is good.

I would like to report that since sunday of last week, she has been running great since the last megasquirt install, and I used the tune I made when you sent back the ECU a couple months ago. Fingers crossed it stays 4 cylinders for more than 3 weeks this time but we shall see.

When it happens again this time around (which as stated, was 3 weeks after you inspected it and reflashed it) I will definitely make logs, live videos with my gopro, and everything I can to document this phenomena.

Thank you for all the help, hopefully I didn't jinx it and she defaults today haha.

For what it is right now, she's solid. This thread will get bumped back to the top if the error occurs again.

-Rick
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Old 07-30-2015, 10:54 PM   #27
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So the symtom came back. Exactly 3 weeks of running good just like it did the last time it was "fixed" datalog to come soon!
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Old 07-31-2015, 01:25 AM   #28
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Here are some logs of the car running on 3 cylinders. Tunerstudio is reporting "NOT SYNCED" the whole time it is running. Is also reported not synced even when it would fire up all 4 and run for 3 weeks just to start over again with problems.

First log or the one file that is bigger is cranking along with runtime. Note that this is full 3 cylinders no spark at all in cylinder one and it is "not synced"

second log i tried to use the sync error part of the log but I did not see a damn thing move when it was on this setting.

I honestly don't even know how to use the datalog portion of this ****. I'm really over megasquirt....almost.......
Attached Files
File Type: csv 3 CYLINDERS.csv (235.5 KB, 28 views)
File Type: csv SYNC ERROR.csv (8.2 KB, 24 views)
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Old 07-31-2015, 08:16 AM   #29
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I think that's an issue with your local TS install.

you always have full sync on all your logs, with no reports of losses.
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Old 07-31-2015, 10:38 AM   #30
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So will updating or reinstalling TS fix my problem?? I'm confused. The log not show anything out of the ordinary braineack?
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Old 07-31-2015, 11:37 AM   #31
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not the 3-cly issue, but your TS showing "no-sync" maybe.
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Old 07-31-2015, 01:46 PM   #32
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Where can I go about fixing the 3 cylinder issue? It HAS nothing to do with any mechanical part on the car. Same as always, reflash didn't do anything with calibrations input correctly. (reflash, loaded up the tune I've had on it for the time it's been running properly, input all the calibrations for my CLT, IAT, TPS, and wideband) Did absolutely nothing to the full time 3 cylinder/ no spark at all in cylinder 1 life.

It runs 3 cylinders full time, Swap in stock ECU 20 seconds after removing MS and it fires up no problem.

Hell I just sold my rx8 injectors because I'll never be able to use them again at this rate. At least when this happens, I keep the stock intake, maf, and ecu in the trunk. Pull over and can have it back on the road just with no boost in 3 minutes flat now...... :/

But this is really getting old........

CAN SOMEONE GIVE ME AN IDEA OF WHAT THE **** TO LOOK INTO OR CHANGE IN MY ECU? IS IT A MEGASQUIRT THING? HAVE I GOTTEN MY MONEY'S WORTH OF A DIYPNP AND IT IS TIME TO MOVE ON TO THE MORE EXPENSIVE THINGS IN LIFE?

It has been the same setup for almost 4 years straight now of being boosted. Nothing has changed.......

and then it runs fine for some odd reason for 3 weeks now...... AND GOES TO **** WITH NO WARNING. I somehow without any real course of action, get it running a week or so later. (I do nothing out of the ordinary but reflash and put my foot to the floor in anger)

and then it runs 3 more weeks on the dot..... AND GOES TO **** AGAIN WITH NO WARNING.

I DO NOT WANT TO HEAR IT'S MECHANICAL OR EVEN ELECTRICAL?
FOR CRYING OUT LOUD, THE VERY FIRST START UP AFTER I PUT IN THE STOCK ECU EVERYTIME, THERE ARE NO PROBLEMS AT ALL. NOT EVEN ONE HINT OF THE CAR TRYING TO CUT SPARK OR NOT RUN FOR THAT MATTER.

Who knows my next steps here??? It is beyond annoying.

Last edited by sickmiatabra; 07-31-2015 at 09:30 PM.
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Old 08-03-2015, 11:35 AM   #33
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Ok, for a no spark condition on cylinder 1, first try using output test mode to fire the coil and let us know if that works or not.
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Old 08-03-2015, 02:29 PM   #34
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Quote:
Originally Posted by Matt Cramer View Post
Ok, for a no spark condition on cylinder 1, first try using output test mode to fire the coil and let us know if that works or not.

I will try that out tonight. I'm in the middle of parting out a 91 Miata and getting funds together for potentially another ECU :/

I was frustrated when I made this post. But going on 5 or so months of trouble shooting and false hopes. Idk

I'll post results of this output test mode when I try it tonight and have read how to do it somewhere. Thank you
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Old 08-07-2015, 12:59 PM   #35
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TTT.

I tried the output test mode out.

The plug in cylinder one has no problem providing spark and I did this in the dark to verify.

Even with all 4 plugs out and laying on the valve cover, I can crank (with foot to the floor for flood clear or whatever) and all 4 spark plugs are all all active.

This brings me back to my "NOT SYNCED"
at all times question. Is it possible that once the car goes "run" the megasquirt is not seeing something and therefore cuts spark to cylinder 1 for whatever given reason??

I'm hoping something has gone astray but I am clueless as to why the second I put in the stock ECU everything fires fine.

Or why the megasquirt will run okay for 3 weeks and then cut out. I have not been able to get it running again after my usual multiple reflashes and the like.

Please, anyone?
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Old 08-07-2015, 01:14 PM   #36
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Quote:
Originally Posted by sickmiatabra View Post
TTT.

I tried the output test mode out.

The plug in cylinder one has no problem providing spark and I did this in the dark to verify.

Even with all 4 plugs out and laying on the valve cover, I can crank (with foot to the floor for flood clear or whatever) and all 4 spark plugs are all all active.

This brings me back to my "NOT SYNCED"
at all times question. Is it possible that once the car goes "run" the megasquirt is not seeing something and therefore cuts spark to cylinder 1 for whatever given reason??

I'm hoping something has gone astray but I am clueless as to why the second I put in the stock ECU everything fires fine.

Or why the megasquirt will run okay for 3 weeks and then cut out. I have not been able to get it running again after my usual multiple reflashes and the like.

Please, anyone?
Also someone look at these. This is what it has always been for years but when I reflash, the difference reports are off the charts as far as things that are different.
Attached Thumbnails
NEWB to flashing here. Requesting step by step on flashing firmware-80-20150807_111207_fab0c6f5060aa48626194df9c19e7c2d33fb42ad.jpg  
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