HRH Posted July 14, 2011 Report Share Posted July 14, 2011 Hey man, I just saw this... Outside the fuel bowl JB weld would work fine, but if its constantly exposed to gas it gets soft and wont work. I should have an extra top piece to a weber (I dont remember if that is the one with the oval top or the standard square top... Is the aircleaner base cut to fit around it?) Also the floats are good unless there is scale (shouldnt be, they were all clean, just stained). Do you know of anybody in town that sells a complete weber kit? Lighthouse wants $45 and their kit and it doesnt include the power valve... Weber carbs direct in NY. I actually have a spare 32/36 rebuild kit in my toolbox if you need one Mike. Quote Link to comment
ggzilla Posted July 14, 2011 Report Share Posted July 14, 2011 Does it say Weber on the outside, or Holley/Motorcraft? Quote Link to comment
Eric Garside Posted July 14, 2011 Author Report Share Posted July 14, 2011 It says "weber made in Spain" across the top of the carb Quote Link to comment
Eric Garside Posted July 15, 2011 Author Report Share Posted July 15, 2011 I got the carb put back together and installed and it didnt seem to change anything... I took a video of me trying to keep it running so maybe this will help diagnose it. Where is progressively got worse over the course of two days I dont think its timing. That leaves fuel or ignition issues. It has spark and seems to be getting enough fuel but the only thing I cant think is to try replacing the fuel pump?? Any ideas would really help, Im officially lost... Quote Link to comment
HRH Posted July 15, 2011 Report Share Posted July 15, 2011 Bad fuel pump would certainly do it. I've had them reverse suck on shut-down, empties the bowl right out. Clogged return line could also be it. Quote Link to comment
Eric Garside Posted July 15, 2011 Author Report Share Posted July 15, 2011 Do I get the North Idaho Ratsun hook from Post Falls Napa?!? Where is the return line? Quote Link to comment
ggzilla Posted July 15, 2011 Report Share Posted July 15, 2011 The return line is right next to the fuel line, runs from the tank to the engine compartment. Even more important is the third line, the vent line. Quote Link to comment
Eric Garside Posted July 15, 2011 Author Report Share Posted July 15, 2011 Ive got a new pump coming in from Schucks so I will give that a try this evening. How would one go about checking for clogs in the return/vent lines? Quote Link to comment
H5WAGON Posted July 15, 2011 Report Share Posted July 15, 2011 Are your floats taking in gas....Are they sealed up? If you shake them around and you here splashing inside....NOT GOOD. Double check float level also. Quote Link to comment
Eric Garside Posted July 15, 2011 Author Report Share Posted July 15, 2011 No fuel in the floats. What is the correct float bowl level? Quote Link to comment
H5WAGON Posted July 15, 2011 Report Share Posted July 15, 2011 I'm not sure....no info in the kit? Quote Link to comment
Eric Garside Posted July 15, 2011 Author Report Share Posted July 15, 2011 No paperwork at all... I was a little bummed because I dint know where all the o-rings went... Quote Link to comment
H5WAGON Posted July 15, 2011 Report Share Posted July 15, 2011 Not the best picture but 40mm compressed, 50mm drop. Weber Specs. Measured from the bottom of the carb top without gasket © top to bottom of float.(G) Quote Link to comment
hogboy52 Posted July 15, 2011 Report Share Posted July 15, 2011 It's pretty clear from the video that the Idle transition circuits of the carb are not working. There is a series of small holes above the throttle plate that add greater amounts of fuel as the throttle is opened up to about 30%. Above that the main jets feed through the small venturis at the top of the carb. The motor starts and runs at high throttle so ignition and fuel feed are good enough. Cleaning a carburetor usually requires high pressure air or water to blast out the passages. Quote Link to comment
Eric Garside Posted July 15, 2011 Author Report Share Posted July 15, 2011 It's pretty clear from the video that the Idle transition circuits of the carb are not working. There is a series of small holes above the throttle plate that add greater amounts of fuel as the throttle is opened up to about 30%. Above that the main jets feed through the small venturis at the top of the carb. The motor starts and runs at high throttle so ignition and fuel feed are good enough. Cleaning a carburetor usually requires high pressure air or water to blast out the passages. it doesnt run smooth at high rpm though... All the holes I could find and sprayed out didnt appear to be clogged. Where do the holes lead to so I can make sure they are cleaned out? Thanks Quote Link to comment
Eric Garside Posted July 15, 2011 Author Report Share Posted July 15, 2011 It looks like the return line was blocked off by previous owner.... Has always ran fine, I didnt think you needed a return with a carb engine... Quote Link to comment
ggzilla Posted July 15, 2011 Report Share Posted July 15, 2011 You don't need a return line. It's there only to (1) help with vapor lock (2) help with EVAPO (cool fuel doesn't escape to the atmosphere). What about the fuel tank vent line? Or is your tank vented some other way? Quote Link to comment
Eric Garside Posted July 15, 2011 Author Report Share Posted July 15, 2011 Replaced fuel pump, no change. Took the gas cap off to "vent" the tank, no improvement... I think at this point beating my head against the wall is the only way to fix it!! Quote Link to comment
Eric Garside Posted July 16, 2011 Author Report Share Posted July 16, 2011 It did this and I was getting closer but then I found the brass screw on the valve cover side (some kind of jet looking hole in it) was loose. Took it out, cleaned it, and now Im back to it not wanting to run anywhere but 3/4 or more throttle.... Quote Link to comment
datzenmike Posted July 16, 2011 Report Share Posted July 16, 2011 It did this and I was getting closer but then I found the brass screw on the valve cover side (some kind of jet looking hole in it) was loose. Took it out, cleaned it, and now Im back to it not wanting to run anywhere but 3/4 or more throttle.... That is the primary idle jet and tightening it has probably shut off the fuel to the idle circuit. I'm no expert on the weber but you should start looking here. If you can drive this car then it's not a fuel delivery problem as it doesn't take much gas to idle on. The fuel return line won't cause bad idle unless the fuel pump is overpowering the float and the carb is flooding at idle. You have some bad adjustment in the idle/low speed or incorrect jets/emulsion tubes.. Quote Link to comment
Eric Garside Posted July 16, 2011 Author Report Share Posted July 16, 2011 ITS ALLIIIIIVVEE!!!!! Thank you to everyone for all the help!!!! It was the screws on the carb adapter plate, apparently I didnt use enough thread locker when I installed it and they vibrated loose over the course of a few thousand miles.... Reinstalled with copious amounts of thread locker and the great news is that I have a freshly rebuilt carb, a new fuel pump, and an empty bank account on Friday night . Thanks again for the help, Eric Quote Link to comment
Eric Garside Posted July 21, 2011 Author Report Share Posted July 21, 2011 Now that its all fixed up my carb is boiling over after I turn off the truck. Anyone have any tips on how to fix this? Thanks Quote Link to comment
ggzilla Posted July 21, 2011 Report Share Posted July 21, 2011 my carb is boiling over after I turn off the truck How do you mean 'boiling'? As in 212 degrees? Or just cold fuel? Running outide the carb or inside? Quote Link to comment
HRH Posted July 21, 2011 Report Share Posted July 21, 2011 Yeah, more info there. If it's literally pushing fuel into the bowl and flooding, then either the float is sunk and/or the needle and seat is failing. Quote Link to comment
Eric Garside Posted July 21, 2011 Author Report Share Posted July 21, 2011 It appeared that fuel was coming out of the secondary barrel (nearest to the fender). it only seems to do this after driving for an extended period of time. Quote Link to comment
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