I hope that's all it is and it's easy for the Nissan Mechanic to fix. Now if he has the parts on hand for a quick fix. I was thinking the same thing or else the needle value is sticking or has something stuck by it to not let it seat properly. But a hole in the float may be able to be drained and then plugged with some glue or something. I'm pretty desperate to get my truck running reliably this winter. I have an appointment to get it into the Nissan Mechanic next week on Tuedday. I'm keeping my fingers cross that he can fix it without keeping it very long.fastboatman29212 wrote:Sounds like you have a float problem. Maybe you have a hole in the float. Then the needle won't stop letting fuel into the bowl.
I want to answer "yes" to both questions, but I have no experience with transmission swaps. Post the question as a new topic rather than in this topic and you'll likely get more views and better advice. This thread is about carb rebuild.ArtDecodon wrote:I have a 1984 720 4x4. Will a 1983 carb fit on it? Same question for the Trans.
Before you adjust the carb, check for vacuum leaks in the lines. I think I measured about 30 feet of vacuum hose when I replaced mine. A vacuum leak would make it idle high. Spray carb cleaner at the base of the carb and see if that causes it to stumble of change RPMs. Spray the vacuum lines and see if any of them do the same thing. Let us know what you find out after checking the vacuum lines for leaks.RicardoGranados wrote:I haave read most everything I can find from you. I've read some of your trouble shooting advice but haven't seen anyone with the same issue I have. I just bought a really nice 1986 Nissan/Datsun 720 Z24 in perfect condition...body wise. Lol It cranks and drives but idols really high. And if given to much gas it stalls out then doesn't want to crank. Not exactly sure what it is but I'm thinking its carb related. Any idea?
Sounds like the return spring for the fast idle cam is stuck or broken. Or maybe it just needs some lubrication.sectionecho wrote:Lots of info here!! That is awesome! Let me ask you something about this carb. For some reason whenever I move the fast idle arm up the throttle goes to normal idle speed, but as soon as I press the gas the fast idle arm clicks up a notch and the throttle goes to 3000rpm. It will stay that way until I physically push the white fast idle thing down, then it will idle normally, but as soon as I move the throttle it jumps to 3000 and stays.. Any help would be greatly appreciated.
The photo below shows a small bump directly below the teeth of the cam. (To the right of the arrow and above the yellow "r" in the word spacer.) That bump is what the cam teeth catch on. The photo shows the correct cam position at rest for a normal idle. It sounds like you are saying yours is rotated 90 degrees CCW. The cam teeth are NOT supposed to contact the "L" shaped cam stop that is close to the 972 mark.sectionecho wrote:Ok in that last picture it shows the fast idle arm with the little teeth pointed down..on mine the arm arms teeth are up more sticking on the little metal piece that is close to the 972 in your picture..is this what could be causing it? I could probably get you a picture.