Hard time starting

Hey wassup guys,
ok so i replaced my fuel injectors (original stock ones, really old and worn) with some venome hi-flow injectors. anyway right after my mechanic and i did this the car had a hard time starting. everytime i go to start it, it takes like 3or4 seconds to start. he told me that it was the “fast idol valve” i checked the dealer and it costs $90. we took the old one out and it was SUPER dirty, and we cleaned it, and put it back, and the car got a bit better. it use to take some 6-7seconds to start but now dropped. anyway he told me we should take it out and clean it again. any ideas or should i just go for the new one from the dealer?:read:

ummmm…did you reset the ecu after you replaced the injectors???