Ok finished my MPFI swap about a month ago. Well first i think i need a new main relay beacause sometimes i go to turen my key and the car doent do anything, so i do it a few times then she turns over but my new main problem is my car stalled and wont start back up im getting fuel im checking for spark tomarrow but , what the??? Thx

 

You might check your grounds. I backed out of my driveway and stalled it once. The jolt from backing out/stalling it snapped the valve cover ground wire in half (it was REALLY old and brittle and hanging on by like one little tiny wire). I replaced that and it started up again. I'm sure there are other grounds that would have the same effects.