unseen Posted October 24, 2011 Report Share Posted October 24, 2011 hey ratsun'ers, I just bought a non running 521 1972 pickup. i replaced the coil, fuel filter, fuel pump, battery, wires, condensers, points, plugs still no spark. still no fuel... i cleared the fuel line to and from the gas tank and still no fuel being pulled to the fuel pump. L16 motor by empte_eyes, on Flickr 1972 Datsun 521 pickup restoration project by empte_eyes, on Flickr 1972 Datsun 521 pickup by empte_eyes, on Flickr 1972 Datsun 521 pickup by empte_eyes, on Flickr 1972 Datsun 521 pickup by empte_eyes, on Flickr 1972 Datsun 521 pickup by empte_eyes, on Flickr 1972 Datsun 521 pickup by empte_eyes, on Flickr Quote Link to comment
josh_t Posted October 24, 2011 Report Share Posted October 24, 2011 you have to turn the key on when you start it and you have to have gas in the tank. he said he was a noob. i had to Quote Link to comment
jon521 Posted October 24, 2011 Report Share Posted October 24, 2011 well the first thing i would suggest is posting those pictures in IMAGE format :lol: Get an EL dizzy, no points to mess with :) so have you taken the fuel line off after the pump and turned the starter over? still no fuel come out of the lines? also: you have a double post Quote Link to comment
Jayden71 Posted October 24, 2011 Report Share Posted October 24, 2011 I would also suggest putting those pics in your first thread. Double posting is frowned upon. Really, we do want yer visit here to be a nice one. Quote Link to comment
josh_t Posted October 24, 2011 Report Share Posted October 24, 2011 yes. make sure you include pics unless absolutely impossible. in that case, you generally will get less replies. not bein a dick, it just happens that way. Quote Link to comment
DanielC Posted October 24, 2011 Report Share Posted October 24, 2011 Here is what I did with a 521 I bought last April. Near the bottom of the first page, what I did to get it to run. Alas, I am still dealing with titling issues. http://community.ratsun.net/topic/30606-my-ratsun-datsun-521/ No fuel, no Spark? Lets do spark first. Do you have battery voltage at the positive side of the ignition coil? If you do not, no amount of new coils, plugs, spark plug wires, condensers, or points will make a difference. Once you have power to the coil, do the points have voltage at them when they are open? For the fuel, I just used an old lawnmower gas tank to temporarily feed gas the the carb. Quote Link to comment
unseen Posted October 24, 2011 Author Report Share Posted October 24, 2011 id love to ditch the points asap, what is the cheapest way ? i havent found any dual point conversion parts avail at my auto parts store ? re: jon 521 - no i havent disconnected the fuel line and turned it over, i will try 2morow thanks guys!!! Ill post pics of my other Datsuns when i get this project sorted out ! Quote Link to comment
metalmonkey47 Posted October 24, 2011 Report Share Posted October 24, 2011 Fix one problem at a time. Things get confusing when you start playing with too much at once. Like Daniel said, spark first! Try re-grounding your dizzy to a hard point, like the manifold, block, frame, etc. Quote Link to comment
unseen Posted October 24, 2011 Author Report Share Posted October 24, 2011 Here is what I did with a 521 I bought last April. Near the bottom of the first page, what I did to get it to run. Alas, I am still dealing with titling issues. http://community.rat...sun-datsun-521/ No fuel, no Spark? Lets do spark first. Do you have battery voltage at the positive side of the ignition coil? If you do not, no amount of new coils, plugs, spark plug wires, condensers, or points will make a difference. Once you have power to the coil, do the points have voltage at them when they are open? For the fuel, I just used an old lawnmower gas tank to temporarily feed gas the the carb. ++++++++++++ thanks for the reply ! LOL-I was looking at your post earlier today before I was working on my truck... no- i dont have voltage on my pos. coil, ??? i just noticed before sunset tonight... Quote Link to comment
DanielC Posted October 24, 2011 Report Share Posted October 24, 2011 When I was trying to start Ratsun, I first checked the compression. If the compression is bad, no point in going any farther. The compression was good enough. If the key does not supply power to the coil, (ballast resistor actually) just use a jumper wire from the positive battery post, to the side of the ballast resistor not connected to the coil. for fuel, dump about a tablespoon full of new gas down the carb. It should fire, and run for a short period of time. If it fires, than start to deal with trouble shooting. Quote Link to comment
Dirk Diggler Posted October 24, 2011 Report Share Posted October 24, 2011 Here you go. http://community.ratsun.net/topic/17444-electronic-ignitions-for-l-motors-4-cyl/ Are you sure you got the fuel pump arm on the correct lobe of the cam? Did you put it to top dead center before installing? Quote Link to comment
flatcat19 Posted October 24, 2011 Report Share Posted October 24, 2011 In before the convergence. Quote Link to comment
flatcat19 Posted October 24, 2011 Report Share Posted October 24, 2011 In before the convergence. Quote Link to comment
datzenmike Posted October 24, 2011 Report Share Posted October 24, 2011 no fuel or no spark replaced the coil, fuel pump, fuel filter, battery wires, plugs, points, condensers, On a truck this old it probably didn't hurt to change all that stuff (except maybe the fuel pump, they rarely go bad) but as a rule it's best to trouble shoot the problem rather than throwing new parts at it. As stated you need two things to run... fuel and spark. To a lesser degree you need compression but even with low compression they will usually start. Since you say both are missing it doesn't really matter which one I start with. Fuel delivery I have found that when the lines are empty it takes a lot of cranking the motor to draw any fuel. The filter and pump are also dry as were replaced too. Get one of those cheap siphons that have a squeeze bulb to prime them with. Connect it to the hose that goes to the pump and use it to draw fuel up as far as the pump by hand. Now, when you get your spark working a couple of teaspoon fulls of gas should fire it up briefly, enough to prime the pump and keep you going. When I was younger in the 70s I used to run out of gas all the time. So to prime the system I would blow into the tank fill hose, inhale through my nose and blow into the tank. Usually three breaths would pressurize it enough to start to fill the carb. I would check the sight glass on the front. I do not advise this as gasoline fumes are very dangerous to breath in, just saying that it works with a bit of practice to get a tight seal. I have merged your double post with pictures into this one and erased the third post. In the future one post, THIS ONE should be used for fixing your fuel/spark problem. If you decide later to start a project thread I can move this one to it. This will keep all your 521 related Q&A together. Quote Link to comment
unseen Posted October 27, 2011 Author Report Share Posted October 27, 2011 update: We have Fuel and Spark ! Cleaned distributor connections, extensively drained and cleaned the corroded gas tank in n out, scraped rust inside the tank, in and out of fuel lines, blew the nastiness out w/ an air compressor. re-did points, gap burnt up a coil n replaced it primed fuel pump and lines after cleaning out once again w/ air compressor noticed awesome exhaust leaks ! replaced bad wiring from coil to distributor ! replaced distributor rotor ----------- -The truck fired up and burned out 20 years of neglect, it ran pretty good until rev'd up exposing a few exhaust holes in the pipes, eventually smoking and motor began to run a little rough misfiring, -Underneath the carb a white smoke steadily poured out, faintly smelling of coolant?/ not sure though, -My ignition switch seems a bit sticky, and fell out... ------------ -Tomorrow I'll patch the exhaust holes w/ some empty Tecate beer cans currently full in my fridge and some old rusty hose clamps -Trace that leak under the carb -Check plugs -trace a couple small oil leaks -check out front brakes Quote Link to comment
banzai510(hainz) Posted October 27, 2011 Report Share Posted October 27, 2011 burnt up a coil n replaced it How does this happen? Hopefully you got another Point coil, Yes they is a difference Quote Link to comment
racerx Posted October 27, 2011 Report Share Posted October 27, 2011 Most auto store will check your coil...before buying one have it checked out...you may want to consider buying a HO one, if later you decide, to add elect. egnition system.. Quote Link to comment
unseen Posted October 29, 2011 Author Report Share Posted October 29, 2011 UPDATE: Pulled off all four Brake Drums: -Need to replace both front drums, cylinders, shoes, springs ( full rebuild) (Autozone quoted $120 for front brake parts, Does anyone know best price for front drum brake parts from other auto parts stores ? 1972 521 L16) also: - re-wired distrib and coil - patched exhaust holes - repair and clean air filter Quote Link to comment
unseen Posted October 31, 2011 Author Report Share Posted October 31, 2011 burnt up a coil n replaced it How does this happen? Hopefully you got another Point coil, Yes they is a difference lol bad wiring , left the key on and started another project, looked up and saw it steaming up ! Quote Link to comment
unseen Posted November 1, 2011 Author Report Share Posted November 1, 2011 recent motor pic: Untitled by empte_eyes, on Flickr Quote Link to comment
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