I just got another DE for my 03 350z. I swapped the motor and the first time I got it running and driving with small issues like getting my trans fluid low but other than that it ran super smooth for the first run. But after that I ran it maybe one more time and on the third run it starts and runs but I need to flutter the gas pedal. If I stop fluttering and my rpms drop to 1k it’ll go into idle and no response with lights up in the dash. I don’t have plates on the car right now so I don’t want to drive it to a shop as I still need to do new rotors and brakes and ofc the plates I shouldn’t drive on the street. But I’m at a loss as to where to go next.