I finish the swap to my FC. She started and running idle at 750-800rpm range perfectly fine but like 10min later it'll would just die. Or it i take it for like a long drive i cant let go the throttle or she'll just die and i have to wait a while till she'll start up again. I get series for back firing from time to time.. so im not sure if the injectors are leaky or timing issues is on hand here.

 

When engine first started cold, it should idle quite high, then drop to the 750/800 range. Check timing, then check for any vacuum leaks, BAC operation, and check/adj the TPS for starters. Make certain plug wires are on correctly.