First of all I would like introduce myself my name is Josh. I am new to this forum along with Datsun/Nissan trucks. I am an avid minitrucker and own a few minitrucks. I have used this forum for about a week or so doing a lot of reading and trying to become more familiar with the Nissan 720 /z24 engine. This forum has been very helpful with some minor issues that I have had with my 1983 Nissan 720. The problem that I have encountered now, I am having a hard time trying to search for a specific answer. My Nissan has been garaged for a number of years from the previous owner. It has 53,000 orig. miles. Nothing has been tampered with or messed with. The truck is entirely stock. By the way I consider myself a beginner/novice when it comes to engine problems and solutions.
------Here is my issue- My carburetor has been acting up recently. Upon start up the engine will rev until I press the gas pedal to kick down the carb. As soon as I do that the idle drops in rpms and stalls. I have driven it by feathering the gas while working the brake and clutch to raise the rpms. It drives perfect at highway speeds 55- 65mph. As soon as the truck is put in neutral the rpms slow to the point that the truck stalls. I restart the truck with no problem after the stall. It just does not seem to have a smooth idle. I have not touched the idle mixture screw because this problem has just came about and I figured that if I were to make an "adjustment" that I would be constantly trying to get the fuel mixture correct. Could the problem be the EGR, or the anti dieseling sensor, or the throttle valve switch, or any other part that could cause this with my stock Hitachi carb. I'm at a loss for solutions for this problem. My Haynes manual does not answer these questions. Any help would be greatly appreciated. Later Josh
p.s. sorry for the long post