carb linkage problem

[robsanab]

I know!... another linkage sticking post! But this takes a new turn from what I've seen...

It's a new 32/36 weber installed 7 months ago... the throttle has just started sticking badly in the idle position... I have taken off the linkage to verify it is indeed the carb and NOT the linkage or pedal. If I tighten the carbs throttle shaft nut as I should (finger tight and then a bit more in order to bend the tap to the flat side of the nut), it sticks really bad and will not idle down (because it is stuck)... I loosen it and it still sticks a bit... the only way it won't stick is if the nut is way too loose and all the washers are loose, but then I lose throttle response and my idle is erratic and of course something will wear badly.

I have adjusted it every possible way... used lube... taken it off and checked for throttle plate bind. Anyway I adjust it, it is a huge PITA to drive.

talked to the Pierce Manifold tech and as helpful as they usually are, he just told me to send it to them and they will check it. That is a hassle and cost... any one have any ideas?

[Mike Self]

1) Didja check the return spring to make sure it's installed properly and isn't binding against the heater hose? It can be installed two ways (orientation of the hook to the linkage) and one way will cause it to rub against the heater hose. It may also be weak, but I doubt that; they don't fail often.

2) Have you greased the ball joints at each end of the rod that connects the carb with the firewall? How about the linkage down under the car and the pedal itself?

3) Have you determined that the problem occurs when you tighten the nut that holds the horizontal link to the carb throttle spindle? If that's the problem, either buy a proper sized plastic washer or cut a small piece of sheet Teflon to fit and grease it well, then install between the carb body and the nut. Then see if you can jam the threaded end of the linkage (where the ball joint is) against the nut on the spindle so that the spindle nut isn't tight against the carb body but still keeps the linkage from unscrewing itself.

Something has gotta work, as this isn't a normal problem...

cheers

mike

[robsanab]

yes number 3. I have taken off all the linkage to isolate the problem to be at the carb. I THINK I know what your talking about... i will try that. Just didn't think that would be an issue on a brand new carb.

So what your saying is... take the carb linkage off, all the way to the carb body and whatever washer or bracket that is up against the carb MAY be what's sticking? IF so add a plastic washer or something fictionless between the carb body and the carb linkage?

Thanks

[TJs692002]

what type of choke are you running? if manual choke your choke flap could be the culprit causing the sticking. Just take it apart and dip it. You can get one gallon size chem-dip carb cleaner for $20 and the 32/36 fits perfectly in there. let is soak for 24 hours, rinse everything off and reassembly. You shouldnt have any problems after that.