I just finshed by rebuild on my car and now I have problems keeping her idling right. Will not having my y-pipe installed yet give me problems with my car idling and flooding out? I had put a fuel pressure gauge on and it reads 35 psi with the key on. After I crank it, it goes to 40 psi then when it starts to stumble and flood it jumps to 45 psi before dying. Would my fuel pressure regulator be out?