Hey there, I just finished plugging in my ecu into my 95 miata and now it wont start. I have tried cranking for 10 seconds to no success, I currently have it on a na8 ecu basemap but nothing is working. I do not have the wideband installed yet and I find the pins to crimp on onto the iat sensor. Any idea whats going on? I plugged in the ecu into the harness that came with my speeduino. I have taken the fuse out of the fusebox. I routed the vaccum line from the map port on the throttle body which was capped off before. Any idea what is going on? The ecu doesnt have any problems connecting to my laptop on tunerstudio.

Thanks

 

Yeah you need a wideband and then to learn to tune.

 

Is your fuel pump priming? There are some mods to do on the speeduino to make it run on an NA8 48 pin.

"Fuel pump output pin should be set to A9"

 

So you do or do not have the Gm IAT sensor set up? You need that in place of your maf or else the car won't want to start. Also as shuiend said, you really do need a wideband if you even want to experience the benefit of an aftermarket ECU.