1981 Nissan 280zx what else can you check besides mass air flow sensor distributor timing and poidle air sensor the car still pops and sputters when you start it until its warm has loss of power?

Answer 1

Ther is a cold start fuel valve on the intake that maybe malfunctioning. The value is open during cold start. Check wiring. The Haynes manual for the 1981ZX has procedures to test this valve