efi Megasquirt Troubleshoot

[burndog]

HELP !!!

 

I was tuning up the car and going through my .MSQ making some seat of the pants changes and have the car running great.  I am in the garage, car running, USB connected to ECU box editing some variables and pooof, the ECU goes offline, the LED's on the ECU go out and the car stalls.

 

Now I cannot get laptop to connect to ECU and I cannot start the car.

 

Has this happened to anyone else?  What could have happened?

 

Thoughts?

 

Help,

 

BURNDOG

[allbim]

You lost power. Blown fuse, bad connection etc.

[burndog]

OK, I get that, but I do see a flicker of light to one of the RED LED's at ignition, then nothing.  I seem to have power to everything else but the ECU, so is there an inline fuse or possibly a fuse within the ECU box itself?

[allbim]

 Assuming that you have MS-2, you should have +12V or whatever your battery voltage is, at pin 28 of the 37 pin connector. 

Make sure you haven't lost your main ground connection(ECU to engine). There is no fuse inside the ECU box but there should be one on the relay board if you have one. Did you do the MS installation?

[burndog]

Unfortunately, I acquired this vehicle and set up.  I was not the original builder and wish I could / should have been in order to know all that this configuration entailed.  It still seems strange that all this happened while in the midst of the car idling and me working with the MS connected to the ECU.

 

I always seem to get put back at square one as I improve, tweak or tune the car.  Oh well, it is still fun and rewarding to figure it out each and every time, which is why I own a 38 year old car!

 

I am sure I will find the answer...

 

BURNDOG

[allbim]

Things do shake loose while an engine is idling.