DatMo Posted January 22, 2016 Report Share Posted January 22, 2016 Hey guys so I'm having an issue running a 32/36 where every time the car heats up for just s little bit, the butterfly's seem to go soft or won't spring back so I figured it was my carburetor and after purchasing a new one, I realized it was not. I'm not sure what the problem is but the butterfly's don't seem to close but then after the car is off and cools, they become resistant again. I've heard it could be from water in the manifold but I have no idea how that would happen in the first place. Any advice would help. Thanks for your time!:) Quote Link to comment
G-Duax Posted January 22, 2016 Report Share Posted January 22, 2016 Have you have inspected all the linkage for bind points, and lubed all joints, including the throttle shafts ? 1 Quote Link to comment
banzai510(hainz) Posted January 22, 2016 Report Share Posted January 22, 2016 This is a hard way to learn. Soon as you took it off you could ck it out and see if still binds. most times the cable nees lobe or cable isn't routed right or not enogh return spring. Most webers still need the extra spring to shut it closed. hoping this is the normal butterfly not the choke butterfly 1 Quote Link to comment
Stoffregen Motorsports Posted January 23, 2016 Report Share Posted January 23, 2016 If you loosen the throttle shaft nut that holds the linkage, does it spring back? A common mistake when swapping from the supplied linkage to the Datsun linkage is getting the washers/spacers wrong on the throttle shaft. Is it cable or shaft type linkage? Other common problems are the linkage return spring on the firewall not being the right length/tension or binding in the general area of the shaft pivot.. 1 Quote Link to comment
datzenmike Posted January 23, 2016 Report Share Posted January 23, 2016 Could be binding on the adapter plate below it. If 620 the cable may be sticky. Do not oil, use graphite powder ot dry lube. Check floor mat. If 510 it's maybe the linkage. 1 Quote Link to comment
DatMo Posted January 24, 2016 Author Report Share Posted January 24, 2016 I've inspected all the linkage and it all works fine and returns as should with good resistance. Every carb I seem to put on there, eventually the flange goes soft and stops resisting back to place. It's actually on an old celica but I figured it's all the same. The linkage doesn't seem to be the problem so I'm not quite sure. Quote Link to comment
superharry Posted January 24, 2016 Report Share Posted January 24, 2016 Choke butterfly? If electric choke, that would have some resistance cold, and softer warm, is that what I read? Does the vehicle not run correctly? Or are you just pushing it open and trying to find something wrong?!? Quote Link to comment
datzenmike Posted January 24, 2016 Report Share Posted January 24, 2016 Hey guys so I'm having an issue running a 32/36 where every time the car heats up for just s little bit, the butterfly's seem to go soft or won't spring back so I figured it was my carburetor and after purchasing a new one, I realized it was not. I'm not sure what the problem is but the butterfly's don't seem to close but then after the car is off and cools, they become resistant again. I've heard it could be from water in the manifold but I have no idea how that would happen in the first place. Any advice would help. Thanks for your time! :) I've inspected all the linkage and it all works fine and returns as should with good resistance. Every carb I seem to put on there, eventually the flange goes soft and stops resisting back to place. It's actually on an old celica but I figured it's all the same. The linkage doesn't seem to be the problem so I'm not quite sure. I know YOU know what you mean but the description makes little sense to me. First is there really a problem??? What happens when "the butterfly's seem to go soft or won't spring back" does the car drive differently? Can you drive the car? Is this what you're talking about??? Quote Link to comment
superharry Posted January 24, 2016 Report Share Posted January 24, 2016 That's what I was thinking, from the description. And didn't mention a drivability issue... 1 Quote Link to comment
DatMo Posted January 26, 2016 Author Report Share Posted January 26, 2016 Choke butterfly? If electric choke, that would have some resistance cold, and softer warm, is that what I read? Does the vehicle not run correctly? Or are you just pushing it open and trying to find something wrong?!?the car won't idle once the butterfly loses resistance. Quote Link to comment
DatMo Posted January 26, 2016 Author Report Share Posted January 26, 2016 I know YOU know what you mean but the description makes little sense to me. First is there really a problem??? What happens when "the butterfly's seem to go soft or won't spring back" does the car drive differently? Can you drive the car? Is this what you're talking about??? no. I'll try to snap a picture when I have a chance but the butterfly remains completely vertical through idle or when I'm throttling. The car won't idle once it reaches that point. Quote Link to comment
banzai510(hainz) Posted January 26, 2016 Report Share Posted January 26, 2016 pull out idle jet and clean make sure the mixture screw is about 1.5 turns out but this has nothing to do with the orginal proplem of binding Quote Link to comment
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