Why does an engine sputter in a 1984 Datsun when it reaches over 2000rpm's?
Check the fuel filter. May be partially clogged. If not, check spark plugs for corrosion.
It's almost definitely the MAF sensor.
Will the transmission cause your 99 ford expedition bog down and sputter when accelerating 4.6liter?
More information is needed. Which 1974 datsun, and which motor? The make, and model of the car, as well as the numbers of cylinders are needed, total displacement of the engine would also be helpful. The datsun pickup across that year, the datsun 240/260 series cars, and several others had substantially different engines and distributors.
Hmm, I had a similar problem with my Ranger. It had an untraceable electrical problem, and we sold it for scrap. Symptoms include backfiring, severe loss of RPM before backfiring, dying unexpectedly, just about everything it shouldn't do. How bad is the sputter? Does it sputter, or does it sound like a large dying animal?