Hi guys I haven't posted in a long time and im not sure of the proper etiquette but im hoping someone can shead some light on a issue im having. I have a 1993 Enfini Rx7 with a street ported 13b with a single turbo set up running a Apexi power FC ECU. I am having an issue with my car. She is freshly rebuilt and still in the break in phase. I noticed recently that it’s starting to so some 3.5k hesitation and stuttering. It runs fine for 10-15 min then shuts off. checked the TPS and it’s working properly. I think the issue might be a failed fuel filter, a bad ground on my ecu. The thermostat switch is bad or maybe there is an issue with the relay banks for the fans on the rad. I am not 100% sure what is causing the issue but it seems something is sending a kill engine signal of sorts. It was suggested also that it could be a bad coil that's causing the spark to break up under load. This seems most likely. Anyway Just thought where better to ask my questions then on this site?