Nissan Pick-ups and Pathfinder 1970-1988

Mixture Heating System



See Figure 1

Gasoline Engines Only

This system is found in 1983 California trucks with 4wd and certain Canada trucks. It is employed to warm the air/fuel mixture after initial start-up. Operation occurs by means of a water temperature switch and a relay, that controls a heater/insulator plate positioned between the manifold and carburetor. It aids engine start-up ability and improves initial emissions discharge.

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Fig. Fig. 1: Mixture heating system