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-   -   MS1 losing CAS signal (https://www.miataturbo.net/megasquirt-18/ms1-losing-cas-signal-66317/)

skullzaflare 06-05-2012 02:56 PM

2 Attachment(s)
the orange wire i added for launch control

https://www.miataturbo.net/attachmen...ine=1338922580
https://www.miataturbo.net/attachmen...ine=1338922580

Braineack 06-05-2012 03:17 PM

1 Attachment(s)
yeah, you need to move the blue and green wires and add a 100-300ohm reistors on each as such:


Green wires:
https://www.miataturbo.net/attachmen...ine=1338923846

then youll use NON INVERTED for the spark output method. should see the dropouts go away, luckily your ignitor is still healthy.


you can probably go ahead and add that capacitor and remove c30 as well.

skullzaflare 06-05-2012 03:52 PM

i just slide the housings off the green and blue wires, they have a 330ohm resistor on each, would that be to much to reuse?
O O B G

Braineack 06-05-2012 04:04 PM

yeah but they arent going to the right spot and they aren't pullu p resistors, they are inline so far as i can tell.


look at the diagram i posted and compare how they go into the board (led side only)

skullzaflare 06-05-2012 04:10 PM

1 Attachment(s)
i can solder them in if needed be. i dont have the money to order anything lol
https://www.miataturbo.net/attachmen...ine=1338927059

Braineack 06-05-2012 04:36 PM

2 Attachment(s)
do this and change the spark setting. in the least this will solve the issue...well more than likely.

https://www.miataturbo.net/attachmen...1&d=1338928589

skullzaflare 06-05-2012 04:45 PM

1 Attachment(s)
hows this?
https://www.miataturbo.net/attachmen...ine=1338929124

skullzaflare 06-05-2012 04:51 PM

1 Attachment(s)
should i eliminate these? im not sure what they are for
https://www.miataturbo.net/attachmen...ine=1338929504

Braineack 06-05-2012 05:09 PM

no just try what i said.

skullzaflare 06-05-2012 05:23 PM

now it wont start, just cranks

Braineack 06-05-2012 06:12 PM

Its missing r24 and r26 isn't it?

Braineack 06-05-2012 06:14 PM

Yeah in the top pic of the board...see the two missing resisotrs by the leds? You need those. 1k iircc

skullzaflare 06-05-2012 06:20 PM


Originally Posted by Braineack (Post 885907)
Yeah in the top pic of the board...see the two missing resisotrs by the leds? You need those. 1k iircc

26 and 29 is missing, 24 is still there

Braineack 06-05-2012 06:30 PM

Yeah that. You'll need them. You can steal from elsewhere on the board on sec and ill figure it out

EDIT: sorry was on phone. steal from r42 and r55, they are next to each other, center of the board. put them in r26 and r29.

skullzaflare 06-05-2012 06:57 PM


Originally Posted by Braineack (Post 885913)
Yeah that. You'll need them. You can steal from elsewhere on the board on sec and ill figure it out

EDIT: sorry was on phone. steal from r42 and r55, they are next to each other, center of the board. put them in r26 and r29.

ok just did that, going to go out here and try it

one question, i noticed on the diagram you have above, it shows there should be a 1k resistor between iac1a and js8 for tach, then 470 for iac1a to another spot
if you look at my pic, look at my brown wire for tach, its missing the 1k, and it had another resistor running from the js8 to another hole across from it, not where shown in the diagram

skullzaflare 06-05-2012 07:23 PM

still no start

Braineack 06-05-2012 08:02 PM

maybe you need to revert ( just lift one leg of r44 and r52 back up, you dont need to replace them back), but that should have done it.

skullzaflare 06-05-2012 08:09 PM


Originally Posted by Braineack (Post 885943)
maybe you need to revert ( just lift one leg of r44 and r52 back up, you dont need to replace them back), but that should have done it.

you said 42 and 55 last time, so pull 1 leg on 44 and 52?

Braineack 06-05-2012 08:16 PM

it was 42 and 55, you moved them to 26 and 29 correct?

sorry, im on my phone and going from my poor memory when im replying.

skullzaflare 06-05-2012 08:19 PM


Originally Posted by Braineack (Post 885946)
it was 42 and 55, you moved them to 26 and 29 correct?

sorry, im on my phone and going from my poor memory when im replying.

yea they are on 26 and 29 now, car didnt start before moving them, or after

if it makes any different, the tach isnt moving any of the attempts yet


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