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HIGH IDLE AFTER HAVING NEW TIMING CHAIN INSTALLED,ALSO TAPPING NO
When 1985 nissan w/standard 5spd. is warmed up "the idle slowly climes up very high,this was not happening until timing chain was replaced last week. everything was replaced, also when acellerating it has a blurbing tapping! sorta noise now realy weird, do you think it needs the valve`s adjusted?
this dont change no matter how long it is driven,we disconnected the choke and that didn`t change a thing,
thanks ,sandy
Hi,I have a 85 nissan 720 4x4 2.4 with a Weber carb,never had to mess with the timing chain,but I do have another engine in it.These trucks have carb, issues,I got rid of my stock carb,couldn't do nothing with it,dealer said they were junk,so I put a Weber on it and it is so awesome now.The valves should be adjusted when the engine is hot.Could be the person that put the new timing chain in did it wrong.Here's a video I did after I installed the Weber carb.I never had a issue with having to adjust the valves.My old carb at the end would always idle high.The timing might not of been set right with the new timing chain.I have the factory repair manual I bought from the nissan dealer.I've had my Truck since 92,it's mint,speedo has 343,000 miles on it,Jasper engine has 53,000 miles on it,transmission is a remanufactured one,it has 3000 miles on it. 85 Nissan 720 4x4 2 4 Weber conversion Here's the carb I put on it.Here's a cool Nissan 720 site to join,it cost 5 bucks,I am a member,it's like a forum where 720 owners react with helping each other,you have a page where you can post pics of your ride and you can see other peoples 720's. http://720world.com/Weber Carb Conversion fits Nissan Pickup 83 86 Z24 Electric Choke Weber...
Nissan Pickup Z24 720 model 1983 1985 1 2 Electric Choke WEBER with hardware and instructions This Redline kit contains the following 1 32 36 DGEV Genuine European WEBER Carburetor...
Nissan Pickup Z24 720 model 1983 1985 1 2 Electric Choke WEBER with hardware and instructions This Redline kit contains the following 1 32 36 DGEV Genuine European WEBER Carburetor...
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I think you screwed something up with the transmission when you shifted into park while moving.I would get a transmission guy to look at the problem.I'm sorry but that's all i can say.
3 degrees before top dead center. Set at warm idle speed (650 - 700 RPM) Distributor vacuum hose disconnected & plugged. Transmission in drive (parking brake engaged).
If you contaminated the throttle cable with lubricant, you HAVE to REPLACE IT. They are dry on purpose - so they do not collect and cake up with crud. This WILL cause it to bind, usually at partial or full throttle and then where will you be? ;) Get that fixed and then consider this:
If it is a carburetor engine (non fuel injection) likely cleaning the throttle linkages, springs and plates with carb and choke cleaner from a spray can will get the parts clean and loosened up. Some of those designs incorporated a weighted cam/ratchet to set idle speed when the engine is cold. As the engine warms, this cam/ratchet uses gravity and bimetal spring to fall back and allow the throttle plates to rest at normal, low, warm idle speeds. Crud, light rust, dry parts will prevent this from operating properly. I once serviced a Dodge B250 van for this very problem because *mud dobber wasps* decided to build a nest in the throttle linkages!
yes, thats the typical symptom of a IAC valve giving you trouble, try cleaning it up but ull probabbly will have to replace it have fun hope this helps
Have you ever had your timing chain replaced? If not, then most likely your timing chain is getting loose and starting to tap on the sides of the housing. This is normal after probably 110-130000 miles, so you may consider this. DOHC engines don't have the lifter tapping problems that pushrod engines have. The reason you only year the timing chain tap at idle and when warm, is the metal expands when it warms up, making the chain slightly longer. At idle, chains and belts "flutter," or shake back and forth. when the engine speeds up, it puts more tension on the chain and it stops.
Vacuum leaks. Check all hoses and intake bolts. Leaking EGR or plugged PCV valve. Air filter plugged. Leaking head gasket. Worn timing chain. Camshaft lobes worn. Valves burned or leaking. Fuel idle control system or sensor. Good luck!
Your timing chain tensioner is using oil pressure to stay tight.Could be your oil pressure is so low at idle the tensioner just can't stay tight.At the next oil change you could go for a thicker oil and see if the tensioner keeps the chain tighter at idle.
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