apalac01

iTrader: (3)

I bought a MS3X From 18PSI a while back, that he used it in a 2001 VVT MX5. I own a 2005 Mazdaspeed MX5 and was told the harness is the same except for the VVT part, mine's Turbo and will need a few wires repined.

Spoke to DIY and was given a MS3-Pro pin list showing function and pin numbers. I emailed a few time till I was able to get things going. So far so good, then e-mail traffic died and I was on my own. After following the list of things to do 1- 16, 16 being the start tuning part, I began to tune.

Thinking back I should of made note of where all the pins were when I got the ecu and harness, in case I ever need to move back. lesson learned.

Cold starting was now set and auto-tune was done through all gears. Issues so far were High flow fans kicked on it killed the car, so disconnected one to relieve the load and set rpm to 1500. this seems to of fixed the dying part.

Drove 80miles to work and was getting auto-tune done most of the way. Last 5 miles I saved and burned into the ecu. Noticed at this time my laptop was about dead as the inverter never charged, shut down and pulled into work. Parked and seen my inverter said fault, checked all connections and was all good. Bought a new inverter and immediately after hooking it up gave a fault indication. Really straight forward goes straight top the battery and connects.

2 inverters saying Fault and 1 was known to be working good before hooking up the MS3X. Now on the way home battery light poped up and rough running started, luckly auto part store was near by and said my battery was dead, purchased a new one. Hot starts are a pain to get going but when it did start it was good and idle was good. No battery indicator was lit and took off home.

Drove the car to work and after 3 days, battery was dead again. Auto-parts swapped out the battery and I purchased a new alternator. 4 days later I was dead again. I checked relays, fuses, wires and think its the MS3X.

Anyone have the wiring for the Alternator in a 2005 Mazdaspeed MX5 and possibly what pins on the MS3X control the Alternator?

hector

That's a really long story.

In TS, basic/load settings, alternator control (who would have thought to call it that!), control output.

Settings and a wiring diagram at trubokitty.com

apalac01

iTrader: (3)

I will see if I can get a pic up, but yes that would of been awesome but it's not there.

Click Basic/load settings and none say anything alternator related.

apalac01

iTrader: (3)

acedeuce802

iTrader: (1)

Why does it say MS1 firmware in the header at the top?

stefanst

iTrader: (1)

Are you sure that we're looking at the tune on your MS3? I see MS1 in the title-bar, which would make me think it's not correct for an MS3. Of course if the firmware is ancient it may just report MS1 even if it's MS3- I haven't been around long enough to have witnessed the advent of MS3.

The FW you're showing in the screenshot does not control alternator. If the MS was on a 2001 car before it may have an additional alternator controller board in the housing, or a circuit built in the prototyping area of the main board.

In order to at least try and help you more, we need MSQs and MSLs.

apalac01

iTrader: (3)

I am still learning and was told this was the way to go (MS3X) and after a set back I had to pack things up and park it. At the time there was no PNP for a Mazdaspeed MX5. So I need different software?

hector

How about some pics of the megasquirt in question.

It's not about software/firmware between the different versions of MS. The firmware is for the hardware version you have so there is no getting around that.

apalac01

iTrader: (3)

So you want a pic of the ECU in the car?

apalac01

iTrader: (3)

apalac01

iTrader: (3)

Looked all over the box for any stickers and found zippo. Mosquitos tearing me up so calling it a day today. I will read up and see what I need to do. So far I've connected successfully and been running around with almost zero drivability issues. Fans and alternator are the biggest issue I have. Since the car had been in storage for the past 2 years, that was the last time I touched MS anything. So sorry in advance, I'm a noob at this.

stefanst

iTrader: (1)

So that picture looks indeed like it's an MS3 and very likely an MS3X. If it has two DB35 connectors in the rear that are both hooked up, it's MS3X.
Still need tune and log to help more.

apalac01

iTrader: (3)

Yes MS3X I believe its 2 DB37 connectors but been a while since I counted the pins. I just swapped laptops since my last one the battery is shot I will try and get it to you tomorrow. I gotta get up for work in 5 hours so kinda short on time.

Thanks for all the help so far.

drizzay222

Are you using stock fans? I had a lot of trouble with Spal fans killing my car for months before figuring that out with MSPNPRO. MSM controls fans differently than the rest of miatas with stock ecu both turn on simultaneously and have two speeds. I had to go back and use FM's Hydra instructions for the wiring and then get one to be controlled by fan control settings and one by programmable on/off outputs. If you think it will help I can share settings when you get car starting and running better.

apalac01

iTrader: (3)

Not stock fans, I have FM's crossflow radiator with 2 high flow fans. They don't say Spal but look like them. I was thinking along those lines. Set up a delay start like 10 seconds away have the 2nd fan kick on. I would be willing to try what your saying, just say what I need to get.

apalac01

iTrader: (3)

Thought I was on a roll this morning, had both laptops hooked up, transfered all I could over to the newer one and took off to work. Now that I'm here at work, I'm looking for the last msq or any of my tuning sessions and all I get is basic examples. I must of missed a file containing what the last tune was and previous progression tunes to go back to incase I messed up. When I get back home in 12hrs I will reload the msq and share. I do see in the examples ms3, and under basic/load settings there is alternator settings. So do I have to start all over from the beginning on MS3 if everything is on set up MS1?

drizzay222

OP, keep in mind I'm not knowledgeable about the different versions and firmware updates, and your Megasquirt is different but I did struggle with this exact problem for far too long, so hopefully this is beneficial. Just remember where you started so you can go back if need be. I also have the FM Crossflow with the big fans. When I initially installed them I was running on the factory ECU, and had not yet upgraded to MS. So I followed the instructions for factory ECU https://www.flyinmiata.com/support/i...roud_hints.pdf. In order to get things working, I had to go back follow their instructions for Hydra 2.7 wiring, which requires wiring one of the two fans differently. It talks about the big fan and small fan, and with the Crossflow they both look the same. I looked at my old stock fans and concluded I needed to leave the passenger side fan wiring alone and made changes to driver's side fan. Then I set things up in Megasquirt like this:

Now the smaller fan turns on at 195 degrees and shuts off at 192 due to the hysteresis. The bigger fan comes on at 198 degrees with some idle up and delay, whereas previously both were controlled by the Fan Control setting through Injector I, and the draw from simultaneous engagement was just too much at once. Good luck, hope this helps!

stefanst

iTrader: (1)

I don't think you can use an MS1 setup on the MS3 (this is a bit conjecture on my side, I've never tried this). How certain are you that what you see in Tunerstudio is actually what is happening in your MS? Are you getting a connection and life readings from the sensors?

apalac01

iTrader: (3)

Ty Drizzay I will look into FM hydra stuff on them fans and set up like yours.

As for the tune I do believe this is all done on ms1 version. The guy that talked me out of the Xede that I was running at the time, said he was not fimiliar with the ms3x but did have a ms1 he ran on his mx5 non msm. Also said these are very similar and after destroying my engine, I pulled everything out of his shop and threw into storage. I rebuilt the engine with forged internals, FM2 conversion, full FM exhaust, and decided to go with ID 1000cc injectors. MS3X was allready rewired and car was running b4 the incident happened. I later found out he did not follow the steps like timing, injector settings, and a few other settings were on that went needed. 18psi sent me his map and I used that as a starting point. Since the guy at the shop set me up I'm guessing he put ms1 since that's what he was use to.

When I get home tonight I will plug into the MS3X and pull what's on it and post it up. I'll have to read through the pdf cause its been a while since the last time I read through it. I want to make sure I don't mess anything up.

stefanst

iTrader: (1)

Did 18psi send you the whole tune (*.msq) file? If so, you may want to use that. I'm sure he was using MS3 code. Of course some ancillary stuff may be wired differently between 18psi and whatever the 'guy' did.
Is there anybody within driving distance who has experience with MS3? Looks like you may be in over your head and somebody with some experience could probably straighten you out in a few minutes to an hour.