- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
www.rv-coach.com/current_category.2178/.../forum_thread_full.html?... Aug 4, 2005 - 100+ posts - 100+ authors
My son has a 77 dodge powerwagon with 440. went to replace starter, ... I have changed out the carb, fuel pump,filtters, and coil. .... We have put in a new ignition module, spark advance (vacuum), coil, ... I have a dodge 1 ton Cary Van. ... Where can I find tuneup specs for the '80 440 engine, like plug gap, ...
Well the engine is fuel injected, so no carb is used. Base idle is set at the factory, and the computer adjusts idle speed depending on load by controlling the amount of air entering the throttle body thru the idle air control valve.
Sounds like the accelerator pump circuit in the carb is not squirting fuel in when you depress the accelerator. That is why you get the lag in acceleration before it decides to launch. When you open the carb you should get a steady stream of fuel from the accelerator pump. With the engine not running look down the carb throat and open the throttle blades and visually check to see that there is a stream of fuel when doing so. If not time to rebuild the carb, or just get another accelerator pump for the carb.
havent woorked on one of these in years ,used to build them on the assembly line in the 70s ,yes a nikki carb would do fine providing you get the right one ,these vehicles used a non progressive carb ,ie - the first venturi opened then the second one ,also all these engines from the first ones in 1971 have stelite coated valves and valve seats so you can use unleaded fuel of 98 octane in them.The tappet settings were done in the factory with a vacumn gauge and they do suffer from wear under the tappet face but the tappet is heat treated so dont reface them on a grinder ,replace them .tappet settings were if i remember for a gt were 12/14 inlet and 18/21 exhaust but i alway done them to 12 and 16 any tighter and it will drink petrol ,also the timing advance was different it advance a lot more compared to the normal engine,got me going now as i cannot remember the distributor code or the paint code on the thermostat housing on the head ,i do remember they had yellow build cards with GT in teh top right hand corner and heavier flywheels with bigger clutches .thanks for the memory jerker it makes a change from monster american cars on here and auto boxes ,Also built V6 zodiac engines as well as V4 transits
I don't remember factory specs but most chevy v8's like about 8 to 12 degrees advance (BTC) Depending upon the fuel quality, you may need to pull back on that a bit. Vacuum hose is also optional as to position. I like using a carb port that is above the throttle plate so advance comes in later. If the engine "lays down" on acceleration, move the hose to any port on the baseplate or manifold that has full vacuum at idle. These are not factory settings but are the ones I used as routine when setting up those engines, when emissions equipment and inspections were not at issue. (but even so, most always passed inspection anyhow.)
Have a qualified mechanic rebuild your original carburator and reinstall it with all the original vaccum hoses and controls functioning properly.
Someone smarter than you and I, designed this engine to function properly with the feedback carburator. Installing an aftermarket carb negates the entire emision control system and will not allow the engine to "Breathe" properly.
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...