SumRando Posted February 27 Share Posted February 27 Ive searched around here and other forums but I can’t seem to figure this out. My idle hangs high when gradually coming off throttle but will usually drop when blipped. I’ve gone through the usual binding areas such as the linkages and plates. I have a throttle cable instead of hard linkages. I’ve gone through vacuum leaks. The only things I have noticed is a slight change in rpm intermittently when sprayed around the shafts. Idk if this is idle mixture related or something else. I have also added springs and now each carb has its own external return spring. Anyone have any suggestions? Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted February 27 Share Posted February 27 It could be so many things Does your linkage bind? Heat Shield? Return springs on the shaft and each carb? You should have both. I make and sell a return spring. https://www.m2racing.com/shop/p/lounge-tunic-/-cream-4l2xd Does it only do it when hot? One way to find out which carb it is. Take the dog bones off, blip each, see which one stays higher idle Quote Link to comment Share on other sites More sharing options...
SumRando Posted February 27 Author Share Posted February 27 35 minutes ago, DuffyMahoney said: It could be so many things Does your linkage bind? Heat Shield? Return springs on the shaft and each carb? You should have both. I make and sell a return spring. https://www.m2racing.com/shop/p/lounge-tunic-/-cream-4l2xd Does it only do it when hot? One way to find out which carb it is. Take the dog bones off, blip each, see which one stays higher idle I do have a heat shield. I have external return springs attached to each carb that I got from pierce manifolds. Before that, I tried 2 return springs on the connecting rod itself and it didn’t fix the issue but only made the pedal too stiff so I don’t think it’s a spring problem. It doesn’t only do it when hot. Even when the car first starts Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted February 27 Share Posted February 27 35 minutes ago, SumRando said: I do have a heat shield. I have external return springs attached to each carb that I got from pierce manifolds. Before that, I tried 2 return springs on the connecting rod itself and it didn’t fix the issue but only made the pedal too stiff so I don’t think it’s a spring problem. It doesn’t only do it when hot. Even when the car first starts Could be a poorly aligned throttle blade? Try to figure out which carb it is. Picture of your setup please Quote Link to comment Share on other sites More sharing options...
SumRando Posted February 27 Author Share Posted February 27 11 minutes ago, DuffyMahoney said: Could be a poorly aligned throttle blade? Try to figure out which carb it is. Picture of your setup please So I have tried to track down if it's a specific carb but there's no consistency in my tests. i've had the linkages disconnected from the rod. I can take a pic later today. Quote Link to comment Share on other sites More sharing options...
SumRando Posted February 27 Author Share Posted February 27 49 minutes ago, DuffyMahoney said: Could be a poorly aligned throttle blade? Try to figure out which carb it is. Picture of your setup please heres a pic Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted Friday at 09:31 PM Share Posted Friday at 09:31 PM Come you can take better pictures then that! That intake is known to have very poor linkage. Quote Link to comment Share on other sites More sharing options...
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