miata94

i just installed my ms2 v3.0 and my car wont start. im still a little confused on how the pins and wires are supposed to be connected from the 64 pin connector to the db37 pin because ive seen at least three different diagrams for a 94 miata on which wire is supposed to go to which pin. i think my problem is in the harness but im kinda lost as to which pins go where and i have been searching high and low for a definite answer. my build is a stock 94 miata with gm ait sensor and supra 305 injectors. my fuel pump turns on and everything but i get no rpm signal on the dash and tuner studio says that my ignition inputs are off or something.

thenuge26

iTrader: (2)

You should probably post a log or pictures of your install or something, otherwise all we can do is imagine your problem. In my imagination your problem is: there is no gas in the fuel tank. So once you fill that up you should be good.

miata94

Well there is gas in the tank it's full. I'll post a pic of my harness in a little. I got the ms used and the guy ran it parallel on a 96

tincan

iTrader: (1)

Try composite logging in tunerstudio to make sure you have cam and crank signal. If the resistors arent adjusted correctly you will get no signal (happened to me).

Look at the ecu pin out for 94 vs 96 and you can confirm if your harness is correct.
Miata Information

miata94

what do you mean if they are not adjusted correctly? i just wired in the remaining 2 resistors in r4 and r7 and thats it. anyone have a pic of there harness that i could go off of to see where i went wrong? ill try and upload photos of it

miata94

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tincan

iTrader: (1)

Miata side should look similar to this (do not follow for db37 side)

https://picasaweb.google.com/franksk...80660845066306

For example on that top row of connector 2 you should have 2 gounds then 5 wires. Starting next the second ground: crank, cam, tach, 5v, tps. You only have 4 wires.

miata94

are those going to be the same for ms2 and ms3 though?

tincan

iTrader: (1)

Miata side will match that diagram (eg 2E goes to "crank in"). DB37 side will be what is configured to your ms2. Ive only built MS3. But i would think everything listed as MAIN would be the correct pinout. You would just have to figure out where all the functions run by the MS3x board go on the main board.

miata94

well i have spark but i dont think my injectors are firing because my injector pw 1 and 2 and at 0% while im cranking it

miata94

loaded a different tune and im getting fuel now and its hitting but not starting and im getting an on off tach signal basically

Matt Cramer

How off is the tach signal?

miata94

well like on the rpm gauge on tuner studio it reads then goes to zero then reads and goes to zero while cranking

Matt Cramer

Please post a copy of your MSQ file and a data log of an attempted start.

miata94

ok ill try and get you guys one today sometime