My Nissan pickup misfires at low rpm. Below 2000. New Maf new map. New crankshaft sensor. Motor jumps around like a bad plug. But plugs are new. Upon inspection plugs are very clean. When in reverse idling out of drive truck stalls but starts right up. I can hear a pop pop poping in the exhaust. When idling. If I get in it real hard it straightened right out. This engine is completely rebuilt. Also the distributor is new. Only thing not new is wires. Truck runs fine except at idle speed and then it's really ruff. I bought a aftermarket crank sensor. Could that be the issue??? Thanks for any and all comments or advise. JC

You bought this many parts. Try a new set of wires to go with all your other new tune up parts.

You can try to pull your plugs again too to read them. Got one that's wet or black? You found your dead cylinder.

Could be a dead injector too...
Diagnose and then buy parts, not the other way around.

Is there any error code?