Andres131313 Posted October 1, 2014 Report Share Posted October 1, 2014 So I rebiult my engine and I'm having problems with my carb. The jets won't spray gas. It will only run when I pour gas in the carb. There is fuel in the carb but it won't go through the jets. Like there's no fuel pressure. What's up with it? Quote Link to comment
Scgreen620 Posted October 1, 2014 Report Share Posted October 1, 2014 Have you tried cleaning the carb? Quote Link to comment
datzenmike Posted October 1, 2014 Report Share Posted October 1, 2014 Turn the auto correct off. Spelled wrong is better than the wrong word. The fuel is sucked into the carb by the in rushing air. Likely the primary jet is clogged with sediment. Time to rebuild it or at least take apart and clean it out. Check a few things. When done replace the fuel filter to prevent this. Cut the old filter open and have a look at the contents. Quote Link to comment
Rays74 Posted October 2, 2014 Report Share Posted October 2, 2014 Andres, why are you starting a new topic with the same question(s) as your other running thread? Quote Link to comment
EricJB Posted October 2, 2014 Report Share Posted October 2, 2014 A carb is just like a toilet. The fuel pump pressure just fills the bowl until the float rises and closes the valve. Fuel pump pressure wont make anything go down the intake. If it does, you have a float valve (needle and seat) problem. Air is pulled through the throat of the carb, from the intake stroke of the piston, It creates a syphon or vacuum, that pulls the fuel from the bowl through tiny orifices called jets. when these jets get plugged with whatever, nothing gets through. This wont effect the acc pump. If it isn't working, that is a seperate problem. Quote Link to comment
banzai510(hainz) Posted October 2, 2014 Report Share Posted October 2, 2014 cycle the linkage so you see gas in the accell pump squirting. If not squirting then the float bowl is empty or the accell pump not working. If bowl empty then the needle valve is not letting gas in or your your fuel pump is not working. accel pump maybe you put the diaphram in backwards if that is possible. when you dump gas in your carb your bypassing everything Quote Link to comment
Andres131313 Posted October 2, 2014 Author Report Share Posted October 2, 2014 The accel pump linkage to the throttle is too long. It keeps the pump mostly down and it won't go high enough to pull in fuel. I know it works because I when I pull the linkage off and move the arm by hand it works. I had clean it all out. I'll try when I get home girm my robotics competition. I need a new throttle cable mount. Anyone know where I can get one or make one? Quote Link to comment
banzai510(hainz) Posted October 3, 2014 Report Share Posted October 3, 2014 take photos of this crap so we get a idea. acell pump work or it dont. think of it as a soda at Mc Donalds. you have a straw in there. you sqeeze your cup the soda comes out threw the top of the straw. Thats it. same priceipal. No work means diapram cracked ,backwards or no gas in fuel bowl. No gas in fuel bowl is needle valve stuck. float stuck at top. bad fuel pump. or crank fuel line before fuel pump (mechanical) buy a new weber DGV. I cant even work on a stock carb Quote Link to comment
EricJB Posted October 3, 2014 Report Share Posted October 3, 2014 X2 on the DGV. I dont bother with a problem Hitachi either. I have, but it had as many pieces as the Turbo 350 I did years ago. Quote Link to comment
Andres131313 Posted October 10, 2014 Author Report Share Posted October 10, 2014 I don't have that option right now. I took the air cleaner off and put some gas down the car to just get it started. As soon as it started I oppened the throttle wide open. I saw that the gas was finally goin in so I slowly backed off and it stopped pulling it in before it got lower then 3000 or so rpm. I know I got close to redline. What does this mean? Quote Link to comment
kelowg Posted October 10, 2014 Report Share Posted October 10, 2014 Plugged jets. On hitachis,there two caps on bottom of carb. Behind there r jets. There r others to ck,but 10yrs since i had one. anyone know,chime in Quote Link to comment
Rays74 Posted October 10, 2014 Report Share Posted October 10, 2014 I don't have that option right now. I took the air cleaner off and put some gas down the car to just get it started. As soon as it started I oppened the throttle wide open. I saw that the gas was finally goin in so I slowly backed off and it stopped pulling it in before it got lower then 3000 or so rpm. I know I got close to redline. What does this mean? Is the anti dieseling solenoid working? It should "click" when energized (key on).......also, don't get so close to redline lol. Sounds to me like the slow speed circuit in the carb is plugged/non flowing. Check that solenoid though first, it will cause issues like you are describing. --Ray Quote Link to comment
datzenmike Posted October 10, 2014 Report Share Posted October 10, 2014 Post pictures of this carb. Show the accelerator pump and the too long linkage. The problem could be something simple if we could see it. Quote Link to comment
H20doctor Posted October 10, 2014 Report Share Posted October 10, 2014 Ditch the stock carb.. Quote Link to comment
Rays74 Posted October 11, 2014 Report Share Posted October 11, 2014 Ditch the stock carb............<<<<I don't have that option right now>>>>> Kids' gotta work with what he's got 1 Quote Link to comment
datzenmike Posted October 11, 2014 Report Share Posted October 11, 2014 So I rebiult my engine and I'm having problems with my carb. The jets won't spray gas. It will only run when I pour gas in the carb. There is fuel in the carb but it won't go through the jets. Like there's no fuel pressure. What's up with it? The accel pump linkage to the throttle is too long. It keeps the pump mostly down and it won't go high enough to pull in fuel. I know it works because I when I pull the linkage off and move the arm by hand it works. I had clean it all out. I'll try when I get home girm my robotics competition. I need a new throttle cable mount. Anyone know where I can get one or make one? I don't have that option right now. I took the air cleaner off and put some gas down the car to just get it started. As soon as it started I oppened the throttle wide open. I saw that the gas was finally goin in so I slowly backed off and it stopped pulling it in before it got lower then 3000 or so rpm. I know I got close to redline. What does this mean? This person does not have much experience with carbs of any kind, you would just trade for a bunch of new questions. There is nothing wrong with the stock carb when new. Comparing to a brand new weber isn't really fair. That said perhaps a new carb might be the ticket but for now this is what we are working with and it should be explored fully to get it running. Quote Link to comment
H20doctor Posted October 11, 2014 Report Share Posted October 11, 2014 I found a webber 32/36 for 70.00 ... there out there on the web you just have to look... the worst thing I ever did was put money into a stock Hitachi carburetor they are the worst pieces of crap ever invented... Quote Link to comment
H20doctor Posted October 11, 2014 Report Share Posted October 11, 2014 Kids' gotta work with what he's got then someone on this board should pay it forward and mail him down a carburetor that they have sitting in the garage not being used Quote Link to comment
H20doctor Posted October 11, 2014 Report Share Posted October 11, 2014 oh wait I just remembered I have a stock carburetor that I pulled off my 610 and it was working perfectly when I pulled it so give me your address and I'll ship one down to you for free Quote Link to comment
datzenmike Posted October 11, 2014 Report Share Posted October 11, 2014 I found a webber 32/36 for 70.00 ... there out there on the web you just have to look... the worst thing I ever did was put money into a stock Hitachi carburetor they are the worst pieces of crap ever invented... Absolutely they, (the Hitachi) are problematic when worn out or not maintained. A $70 weber is just someone else's problem sold to someone else. They are invariably 20-30 years old, have been rebuilt 4 -6 times and have parts missing. They may or may not come with the correct adapter plate, gaskets or the proper air filter. If suggesting a weber, suggest a new one for just under $300. All these parts are included and best of all it's new. Quote Link to comment
H20doctor Posted October 11, 2014 Report Share Posted October 11, 2014 Mine was brand new in the box... $70.00 oregon craigslist...used webers are easy to find, simple to rebuild.. knock off webers on ebay run 150.00 to 199.00 Quote Link to comment
EricJB Posted October 11, 2014 Report Share Posted October 11, 2014 I saw that the gas was finally goin in so I slowly backed off and it stopped pulling it in before it got lower then 3000 or so rpm. I know I got close to redline. What does this mean? You aren't going to see fuel going down the throat of the car when it on the idle circuit. That happens bellow the butterfly. Stupid question, where is the air fuel screw set at? Quote Link to comment
banzai510(hainz) Posted October 11, 2014 Report Share Posted October 11, 2014 we all had to learn the hard wayWebers are the way to go But I did fix a 521 stock hitachi . the mixture screw setting was off and carb was loose on the manifold. I got truck to run will the accell pump. then got up the revs and blocked the main barrel side with my hand and open the 2nd to keep it running. that's how figure it was the main side bad. think it ran on main side also but got fixed. stock hitachi once worn take to the dump is my old mans advice or don't buy old cars. As for shipping the carb FREE H@) Doctor that people don't appreciate this in the end and the car will get scrapped about a month after you give the part. Unless his a good frinds that will actually be into Datsun for over 10years.. Thses are the people I give parts to and then expect the same if I need a part from them Quote Link to comment
H20doctor Posted October 13, 2014 Report Share Posted October 13, 2014 well im willing to help ... if He wants it ...send me a Pm Quote Link to comment
banzai510(hainz) Posted October 13, 2014 Report Share Posted October 13, 2014 I have helped many times. an will still help but just frustrating soemtimes. Now I will help if they do the work and I tell them how to do it.(98% of the time they dont show up) Ted and Datsunaholic I will give parts to Frank Icehouse also. I had about 4 others a have givin parts to and all the cars were sold with in a year. I wasted my time on Lozers Quote Link to comment
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