I have been working on my megasquirt install for a few weeks now. When I installed MS the car idled, but the rpms and AFR were not stable at low rpms. I noticed that 2 on my spark plug wires had a much weaker spark then the other two. So I decided to switch to COP, after the install my car ran for about 10-15 minutes then it died. It never ran again. While cranking, it sounds like the car does build compression. The engine also fires through one or 2 cycles, but not long enough to start. While attempting to start the AFR is at around 9. I'm getting rpms signal on tunerstudio. i didn't change my settings on TS just left it at 99-00 miata. I have good ground and power at the coils.

1.Did I fry the Coils?
2.if so, would all four go out at the same time?
3.Was it my settings that fried the cop?

 

Above is the log from the car, I dont know much about that.


What do you guys think?

 

 

Something is a bit suspect about the composite log; the crank signal (middle trace) doesn't look right. How are the RPM inputs wired up?

 

I really don't have a clue about the rpm input wires (PNP bought used on this forum), but the car was running for over a month without any issue. I then installed the COP and then it ran for only 10 min. after that it would not start. so as matt suggested to look at the crank signal. I bought a brand new crank sensor (Autozone), installed it and it was still the same. I moved the sensor closer to the pulley and now the car starts, the sensor is making contact with signal pickups. This is the only way the car runs on MS. I put the Oem ECU and the car now runs regardless of how close the sensor is.

 

Precisely what MegaSquirt version is this?

 

DIYPNP V1.5B, MS2 Extra

Have you try spark and fuel injector test mode ?