I got my megasquirt built and in the car, but i have no tach signal, and have very weird values of coolant temp, TPS and AIT.

Even with the AIT and TPS disconnected the values were off, TPS was fluctuating and really high, AIT was 70*.


I built this just as the Wikki says to, and have checked everything over more then once.

I can not find anything wrong, any ideas on what to check ?

 

Disconnected sensors always give out strange values.

 

did you calirate the AIT CLT and or TPS?

tach is an easy fix with (1) 1K resistor.

 

Yes I tryed to calibrate them and got no where.

Right now the issue is the megasquirt is getting no signals from the cas.

 

did you follow the MS1 wiki or the MS2 wiki?

 

Ms2 wikki to tee, even double checked my work 2-3 times last night.

 

post pics of your board

 

Can take picture this evening when I get back to the car.

 

CAN and WILL, son. CAN AND WILL.

 

I will so chill, I want this thing running.

 

pictures

 

It's alive and well, lesson learned dont trust the work your buddy did before he gave up installing it in his car.


Now only one issue I have no tach signal to the factory tach how do I fix this ?

 

Becuase that rat's nest is modded for an MSI like I figured would be the case.

 

Um I used the ms2 page from the wiki... And it's running and working fine, but I'm not proud of it this way so I plan to re do it.

 

it appears you are correct and I am wrong.

i didn't look at the top of the board


missing the tach on the dash? add a 1K resistor from b+ to ig- in your diagnostics box.

 

If you can show me the correct way to mod it I will redo it ASAP and clean it up nice like I want to.

Also with the launch control hooked to js7 do I need to build the active low circuirt like ms1 ?

 

No problem I trust what you have to say and what to change.

The resister is an easy fix !

 

really the problem is using all the ugly random wire.

I like to use 22 gauge solid copper wire and try to cut each to length.


just looks clean, easy to follow:

 

I agree that's much nicer and what I will make mine look like. I'm going to go buy some wire tonight. But since there the all florida miata meet Saturday and Easter is Sunday and I work till 6 tonight I don't think I'm getting to it till Monday.

 

i mean if it works it works.