It's a 99 eclipse N/A. I recently did an auto to manual transmission conversion.
today, the car started normally, and drove perfect, but then out of nowhere, the car shut off. headlights and everything. So I put it in neutral, re-started it, and kept going, it continued to drive fine. I got gas, and restarted the car like normal, then on my way home, when I let my foot off the gas, and pushed the clutch in to slow down to a stop, the car shut off, not the headlights or anything, but it like stalled. then when I went to restart it, it wouldn't idle, unless I kept my foot on the gas. I got it home, let it sit for a second, restarted it, and it started and idled fine. and Ideas?

I did not change the ecu because I thought that the only difference was the rev limiter, could that be it?

I rely on my car heavily and really need help with this.