I was 'road testing' my car with the MS installed (stand alone)
Because I was planning on doing many short runs and was hoping to get lots of date to play with, I was running meagtune and recording a data log
No worries

So far all was well, besides running way lean but at least running I was not too worried.
I finally had a chance to adjust my fuel ratio.
All is good now I'm running a little high at idle but Its keeping the fuel ratio at 14.7ish (currently using the stock O2, JAW on order)
I went on my 3rd run and everything seems to be running great!


Because the breaks between runs varied from 15 to 30 mins I left my key-switch enable so the laptop would have the A/C converter running

I started on my 4th run (all fat, dumb, and happy). I got about 1/2 mile and the car died UGH! ! ! !
It acted like I was not getting fuel; I check my fuel pressure gauge and it look ok.
Keep trying and trying still no good
Now because the 3rd run was so good I was not in a hurry to start my data log for the run OOPS

I ended up installing the stock ECU and drove home
Because this all happened around 10pm, no time troubleshoot tonight

Hopefully its something simple

 

Coilpack?

 

Cant be a coilpack if it fired up with the stock ecu. I would be inclined to stick the stim back on and see if there is anything obviously wrong. RPM might be a good candidate.

 

Were you making any changes to the MS during your first run, or simply logging? Try just starting the car in driveway and jiggling the wires all around and see if your car craps out.