Jump to content

JWray707

Members
  • Content count

    103
  • Joined

  • Last visited

Community Reputation

3 Neutral

About JWray707

  • Rank
    Advanced Member
  • Birthday 11/21/1990

Profile Information

  • Gender
    Male
  • Location
    Lake County CA
  • Cars
    1978 Datsun 620
  1. JWray707

    Carb not holding fuel?

    Good to know, thanks Mike. I've disassembled and cleaned it multiple times. Could be the rubber tip is getting caught in the plug hole and I just can't see it. I had an old full glass sight cover I put on so I can see everything. The float will drop and rise with the gas level and in turn the needle valve (at least the peg end) will too. Gas fills up to the line (when it does fill). I'll look into a rebuild kit to try out a new needle valve.
  2. JWray707

    Carb not holding fuel?

    The pump is an aftermarket pump. I know it's pumping gas all the way to the fuel inlet on the carb cause I pulled the hose from the banjo fitting inlet and it's pumping gas all the way through the line. Fuel is being sucked into the manifold, not back through the line. The needle valve is definitely the issue...just can't figure out what's happening. Could possibly be a vacuum issue I guess, not allowing fuel to continue pumping through the valve due to vacuum pressure? I'll recheck all the manifold bolts...maybe a vacuum leak through there.
  3. JWray707

    Carb not holding fuel?

    Yep, pretty sure the needle valve is malfunctioning or sticking somehow. Soaking it in carb cleaner now. Thanks for the responses!
  4. JWray707

    Carb not holding fuel?

    Floats not sticking...I can see the whole assembly and the float drops when bowl is empty and the needle valve drops aswell, maybe not enough though. Might just be something sticking or gummed up. I have an old carb that maybe I can swap some pieces off to see if that helps and maybe it has that screen too.
  5. JWray707

    Carb not holding fuel?

    Fuel is squirting out of the pump strongly and consistently. I sprayed compressed air through the gas line anyways, just to be sure it's clear. Gotta be something with the banjo/fuel inlet, eh? Here's the parts to it... Everything look to be there and complete? It seems to be getting clogged somewhere, but I've cleaned it well. Don't know what's going on, seems like a simple valve setup...probably a simple solution too.
  6. JWray707

    Carb not holding fuel?

    Was tapping on the banjo the only way you got it to work? Don't want to have to do that every time this problem arises. Tapping it didn't work anyway. I tried running it with the gas cap off and still dying.
  7. JWray707

    Carb not holding fuel?

    I am going to try to blow the lines clean with air and see if that helps anything. Like I said, it seems to be clogged or restricted somewhere between the fuel filter and the carb and the fuel bowl WILL fill to the proper level, it just won't maintain the proper level while the truck is running.
  8. JWray707

    Carb not holding fuel?

    No screen on mine...hmm?
  9. JWray707

    Carb not holding fuel?

    It's a brand new filter on there. I can see gas flowing through. I cleaned the needle valve and there was a little spot of dirt on there but I would think that would make it not want to close based on where it was. Can't do the weber (though I'd love to) still trying to pass smog...
  10. JWray707

    Carb not holding fuel?

    Not sure the condition of the gas tank or how clean it is, but I suppose something could have gotten in there or broke loose when the truck was sitting with the manifolds off. I will check the fuel flow, but looking at the fuel filter it seems to be flowing fine. Seems like if anything it's getting clogged somewhere between the fuel filter and the carb if not the fuel inlet on the carb. Could still be from junk in the tank though.
  11. JWray707

    Carb not holding fuel?

    I recently replaced the intake/exhaust gasket on the L20 because I noticed a leak. So now the engine will start and run for about 2 min and then will Rev up rpms close to 2000 and shut off. Luckily I have the glass sight on the Hitachi carb so I can see that the fuel bowl will fill when I first turn the key...start it and it quickly just empties. When I turn the key again it won't refill. If I wait a while it will refill again but it seems to be intermittently. I pulled the fuel inlet and checked the needle valve and cleaned all the components but that didn't help. I can see through the sight glass that the needle valve seems to be functioning the way it should. Fuel pump is working fine. Just replaced the fuel filter. So...ideas? Clogged fuel line? I was seeing something about vapor lock (it was sitting awhile while I was replacing the gaskets.) Possible vacuum leak still on the int/ex mani? Any suggestions would be of great help. Thank you!
  12. JWray707

    High Idle speed?

    Not yet, but I will and spray it again after and see if there's any change. If not, I'll try replacing the gasket and see how that works.
  13. JWray707

    High Idle speed?

    No change when throttle cable was disconnected.
  14. JWray707

    High Idle speed?

    So it's bouncing between 1700-2000 rpms at idle...1300 in gear. Vacuum gauge is bouncing between 10-11. Got in there again and sprayed with carb cleaner and it seems there may be a leak around where the manifold is attached. Worn gasket maybe? Loose bolts? Have to dig into that...
  15. JWray707

    High Idle speed?

    I didn't open the throttle. I don't have a second hand...guess I could've just wedged it open with something.
×

Important Information

By using this site, you agree to our Terms of Use.