Terrano1992

From "Nissan Technical Bulletin" NTB94-020: Nissan has approved 180F thermostat usage (from Maxima/Quest, Nissan p/n 21200-0B000) on a Pathfinders/V-6 Trucks in severe cold regions, if customer has complaints of poor heater performance. 170F is a standard (factory installed) thermostat, recommended to use in normal (not cold) weather.

Check all suspected connectors, wires and ground points thoroughly. I think, this picture may be helpful. "Ignition signal" circuit marked red.

Sorry my poor English... "Ignition signal" is a feedback from primary ignition coil to ECCS module. If it is missed, it can be malfunction in: - wire harness and connectors (most likely, if your engine can start); - resistor or condenser in primary coil circuit; - power transistor module; - ignition coil itself. It isn't distributor or CAS malfunction.