Nissan Repair: ENGINE, crank angle sensor, speed time

Question
I OWN A 88 NISS PATHFINDER XE MY PROBLEM IS IT SEEMS TO HAVE A" SEASONAL" MISS OR STUMBLE ITS RANDOM. I HAVE TO LET IT SIT ALL WINTER (I LIVE AT LAKE TAHOE)ALL SUMMER IT RUNS GREAT WHEN IT GETS COLD IT STARTS STUMBLING (LIKE YOU SHUT THE IGN OFF QUICKLY OR SHUT THE FUEL OFF QUICKLY), IT COMES AND GOES AT ANY THROTTLE POSITION,SPEED,TIME, HOT OR COLD. ALSO IT DIES AND TRIES TO DIE RANDOMLY AT IDLE .I TOOK IT TO 2 DIFFRENT SHOPS 1 TOLD ME IT WAS THE COMPUTER "CHANGED THAT" THE OTHER SAID IT WAS THE CRANK ANGLE SENSOR "HAD IT AND THE DISTRIBUTER REPLACED" ALSO THE O2 SENSOR REPLACED AND IT STILL DOES THE SAME THING. SO FAR IM OUT 175$ IN DIAGNOSTICS AND 700$ IN PARTS WITH NO CHANGE.AT FULL THROTTLE IN HIGH GEAR AT LOW SPEEDS IT IS SLUGGISH ,AND THAT COMES AND GOES .P.S. IT ALSO DONT PASS IDLE SMOG IN CA. 6% CO GROSS POLLUTER  !!!!PLEASE HELP!!!! THE TRUCK HAS 230K MILES IT HAS A V6 3.0 LITER  

Answer
Bill,

I would replace the plug wires and make sure that the cap is new.  That should correct the problem as it seems like the humidity is a concern and there is something in the ignition is intermittently grounding.  The wires or the cap are the most likely problems.