I have a 1989 formula 350 with a cammed 383, headers, Lt1 injectors and stock tune, my question is during the morning it will fire right up and idle at 1500rpms for about 2 seconds then stall if i dont give it gas. if i give it gas it will idle at 700 rpms at a sluggish rough pace until it warms up. after which closed loop mode has a rough idle to it as well, on the drivers side bank it seems. i have true dual sidepipes so i can hear the individual banks fire. I had the injectors replaced with LT1 injectors instead of the old multecs, my question is 7 of the injectors are dark grey, the other is a light almost silver grey, on the drivers side bank. Could it be somehow one multec wound up getting stuck back in? what are the visual differences if any? also at rare occasion it will drop to a low idle at a light and stall, while cruising at low speeds below say 2500-3000 rpm it chugs and spits from the drivers side pipe....cam is a voodoo 270/278 if that may help.