Upgrade Time
 

Upgrading my ms1 to ms3.

When upgrading I also purchased the EBC from DIY.

I plan on running sequential spark, fuel, ebc, a/c.

Is there any reason I need to remove any of my supporting circuits?https://www.miataturbo.net/attachmen...1&d=1377396320

https://www.miataturbo.net/attachmen...1&d=1377396320

I suppose you will be using MS3X for full sequential. If this is the case then you only need jumpers from s12 to js9, from tachselect to vrin, and from vrout to tsel. You are missing some components for the vr ckt on the mainboard such as r52 and r56. The cas input needs a pullup resistor. MS3X also handles spark, ebc, and pwm idle so you don't need those circuits on the mainboard.

Read here: http://www.msextra.com/doc/ms3/build_manual.html

Funny how much less the MS3x uses:

https://www.miataturbo.net/attachmen...ine=1377445063
http://imageshack.us/a/img845/1108/l9ba.jpg

As for actually removing circuits, I think as long as you have all the circuits built for using the ms3 board and expansion you don't really *need* to remove anything.

that's what I was thinking. I planned on leaving everything as is. I'm going to leave all the crap on there unless there is a reason to remove it.

Yea. I'd run through the MS3x build manual to make sure everything that is needed is there. The westfield site is down which sucks (but if you need it I have the PDF for his 90-97 MS3x build).

did you get an expander board too?

you can't leave your crank input circuit as is, the polarity has to be reversed to match the cam in.

yeah i have the expander board too.

will remove. check. now i need to find r56 or an alternative. I should have just sold this thing and bought a new kit. i feel like it's more work to review my board then it is to build a fresh one.

Use the bill of materials on the megamanual to find components for the mainboard.

R56 digikey part number: CT94EW103-ND

thanks southern. What do i need to remove for the crank input. I'm scouring the build thread but it's missing all kinds of pictures. Ill read through the manual but wouldn't mind some human confirmation.

Remove iac1a to js10, remove the pullup resistor at js10, and remove the cap.

The complete vr ckt for the crank input requires adding some resistors, two caps, two transistors, and a diode.

Specifically add r42, r44, r45, r46, r47, r48, r50, r51, r53, r54, r55, c31, c32, d24, q22, q23, and as mentioned earlier the trim pots r52 and r56.

FRT's board has a modified vr ckt from Brain's/Frank's writeup.

iac1a goes to js8 which is also jumped to 5v pin. js10 is unused. Are you talking about the cp next to js8?

nevermind i just started pulling everything extra off. used frt as reference.

Yea remove the jumper and resistor to js8 and remove that cap. js10 was a mistype

Add the components I listed above.

Sigh... Good luck.

lol... if you need better pictures I have a bunch more.

haha what's the sigh for scott?

I jumped vrin & tachselect, tsel & vrout. Just have to make the vr circuit now i think?

I haven't really touched my ms since i made it. Everything made so much more sense then... I feel like a re-re touching this thing now.

Because instead of removing all your wiring and extra circuits and adding 20 components, you could have pulled your MS1 CPU, added the MS3 CPU and moved two wires on the underside and been running MS3.

BUT, I do think since you have the expander it wouldn't be a bad idea to remove all your add on circuits and just run them off the expander.

AND you don't need the VR input circuit. You could the crank signal running through the opto circuit, run the cam in the expander, and be good to go. I see no reason to add the VR circuit in this case.

things I'd move to the expander:
spark outputs
fuel outputs
fuel pump (going to 2O, not using high side driver)
the three relays you have on the proto
idle control

That sounds good to me. If i don't need to build the VR ckt then I don't need any additional components correct? I'm going to be near the electronics store which is clear across town. (30-45min) Is there anything I need while i'm out?

I'm going to setup the opto circuit again for crank and run the rest off the expander. Sounds the easiest to me.

solder wick :P

pretty much. i see no reason why you need to buy components.

soooo to reset my crank ckt I found these instructions

Jump D1
Jump D2.
Jump XG2 and XG1
Jump Tachselect to Optoin

D1 and D2 were already jumped. xg2 and xg1 were jumped. In my spirit of changing things had moved my jumper from tachselect to vrin and am now putting it back to tach select to optoin.

I am now connecting optoin to xg1(or xg2). Also i'm supposed to run a 470ohm pull-up resistor from what looks to be c16 to..... d1?

Please confirm.

https://www.miataturbo.net/attachmen...1&d=1377563248

end result.

Part 2. I wish franks blog didn't go down....

So i'm reading the manual and https://www.miataturbo.net/attachmen...ine=1377566614 do I need to do anything with these jumpers? Next step is to add my boost controller as well. I'm going to do go look around the interwebs for how to install it on my board. If anyone has a quick and dirty install step by step i'll take handouts.


Also. Right now I currently have my fuel pump fuse pulled and have a 1k resistor in my diagnostic box. Is that still necessary with my new ecu?

If it's anything like mine you need JP3 and JP7. I removed JP8 because it was triggering INJ G. Why are you adding a boost controller to the board?

I have MS triggering the fuel pump relay via the light green wire.

I'm not sure what the reasoning was behind the fuel pump being setup the way it was. I had a tach issue with my MS and sent it to scott a in 2007. He fixed it and didn't like my sparkly blue car audio cable I had used so he replaced all of it as well as changed my fuel pump ckt.

Why would I not have MS control my boost controller?

Do you have a JimStim? If so you should power up the mainboard and perform the voltage checks in the manual before installing the MS3 card. Also you can test that the crank input is correct before installation.

You would. But why are you installing things? It's part of the expander board.

http://msextra.com/doc/ms3/General_Pix/ms3x-wiring.png

fair enough.

I don't have a stim but i plugged it in to my car without the cpu in it and checked voltage on tsel and got .06 volts. I still need to flash the firmware too.

Ok. You may also want to check the voltages on the 40 pin socket before plugging in the ms3 card. The pins with 5 Volts should still be good but check that pin 16 has 12 Volts.

A safe way to check the crank input in the car is to turn it over with the fuel pump jumper removed and the coils disconnected. Verify that the cranking rpm is stable in TS before trying to start the engine.

EDIT: the above method is per the ms3 manual for anyone that scoffs at this.

ugh, so much pressure for me to get my MS documents back online.

I'm a little sad frank pulled his down cause of one person? now we all have to suffer :-/. I wish I was more knowledgeable in the area. I would do some nice write ups. maybe I will after I'm done. Why are your documents gone brain, need space?

My sugar daddy decided i was taking up too much bandwidth for free and I was axed.

I was hosting this on my own webserver on my own expense, but that doesn't mean people have to take it for granted. I'm not vising any of you.
I feel bad for you guys as well and I'm planning on taking the site back online shortly. No reason to throw away mine and Scott's hard work over a dickhead.
Need to think of a way to protect our intellectual property though as that seems to be the standard (all those who contributed).

I've got some stuff in the works for a site. I still have a lot to learn though so it'll be a slow process.

That's commendable, but I don't want my work being copied to other sites. Sorry.

Ahh, Frank - what a relief - just last week I was thinking about a wiring issue and thought - hey, just have a fast look at Frank's site.. *dammit* ..
So it's nice to know you will take it back online...
Edit: Make a login for the page standard, so you know who is having access...

Wouldn't be using your work. Which is why it would be a long process. You really do get butthurt fast.

Please do not start this a 2nd time, I am warning you.

I finally have some time to spend on this again. Can I get a paint by numbers or a verification of what I need to do to get this running?

I followed the instructions above. So to my knowledge I have my crank in setup correctly on the board. Does it look correct in the picture and according to me following the instructions listed in my quote?

Secondly:
https://www.miataturbo.net/attachmen...ine=1377566614

Paint by numbers again what do I do with this portion: please consider I am using opto and not vr ckt.

Please verify My optoin ckt is correct for crank
Please inform me what ms3x jumpers and what not I am use then i will flash my board. I should be up and running then?

I am running new fuel and spark wires now. I'm also installing some injectors and hopefully I can be spoon fed enough by the time I finish these tasks to spin through my first 3 gears and maybe some 4th (after some tuning of coarse. :)

I had been short on time for a while and finally got back to rebuilding this thing. Since I'm all over the place I downloaded a manual and brought my MS with me on the plane. I've been short on time but put my mind to making time to finish this damn thing.

I believe to have all my stuff working. I just have to flash and load a base msq.



I have ms3+ms3x in a 1990 miata. Using my old harness for everything but the below is going to my ms3x harness.

Sequential Fuel
Sequential Timing
Boost Controller
Idle Control
Fan

ID 1000 injectors

CAS is off my 1.6
1.8 TB & TPS
Toyota Cops

MS WISE I am running everything pretty much the same as Frank's Westfield blog with the exception of me using hall instead of vr.
Anyone have a base msq for same or close setup?

I'm just shooting this off before I get home. I'll research some when I get home. If I can get a little spoon fed before I figure out I wouldn't cry about it.

So i'm reviving this thread and will refer my other one to this one once I finish this. I want to point out I believe my changes above to be incorrect.

I believe this to be right instead but I'm having sync issues. When I screwed with my board did I remove something I shouldn't have or not add something that I should have?

Also in the pics it's hard to see but there is a jumper from tsel to OPTOOUT

https://www.miataturbo.net/attachmen...1&d=1399513785

https://www.miataturbo.net/attachmen...1&d=1399513785

https://www.miataturbo.net/attachmen...mpositelog-png

this is a link back to my other thread that has my msq and a log.
https://www.miataturbo.net/megasquir...estions-78883/

is there any other info anyone thinks would be useful for me to post in order to get assistance?

found this thread https://www.miataturbo.net/megasquir...-inside-60759/

think it answers my questions. Is vr really that much better than opto?