Alright so i have a 91 Crx si that i just swapped with a DOHC ZC engine. I finally got it in and i went to test drive it today and I heard a pop. But it wasn't like a metal pop, it was more like a plastic or pressure kind of pop (maybe backfire??). And it started to lose power then ended up just stopping. It didnt bog or anything, it just kinda stopped. I waited 10 mins for my dad to get there and it started right back up, on his way driving it home, about 5 mins later, same thing happened but this time it didnt pop, just lost power and slowly came to a stop. I'm really confused as to what this could be. I'm really frustrated and losing hope, Idk if i'll ever get this thing 100%... someone pleaseeee help. thanks guys.