KE70+AE92 Posted May 27, 2008 Report Share Posted May 27, 2008 (edited) hey my carby isnt the best lately ive been having to on a cold startup pump the pump arm of my stock 4k carby to get fuel to the engine for it to start could there be something wrong with my fuel pump or is it the carby? thanks Edited May 27, 2008 by KE70+AE92 Quote Link to comment Share on other sites More sharing options...
philbey Posted May 28, 2008 Report Share Posted May 28, 2008 Are you talking about the accelerator pump arm? Do you have to pop the bonnet and actually pump the arm to get fuel in there? Quote Link to comment Share on other sites More sharing options...
KE70+AE92 Posted May 28, 2008 Author Report Share Posted May 28, 2008 i don't no if the accelerator pump arm it just said it was a pump arm in my gregorys book yeah open the bonnet and pump the pump arm when i pump it i can see the fuel being squirted into the carby Quote Link to comment Share on other sites More sharing options...
Raven Posted May 28, 2008 Report Share Posted May 28, 2008 What happens when you rotate the throttle wheel (where the cable hooks into and do this with the car off). Does the arm your pumping move with it? Because its a linkage setup... Quote Link to comment Share on other sites More sharing options...
tas_ae71 Posted May 28, 2008 Report Share Posted May 28, 2008 (edited) he just answered that question raven :lolcry: just pump it once or twice in car, i usually do but i don't have a choke at all to cold operation is a paint in the arse.. there maybe another problem thats causing it being hard to start. do you keep good maintenance? this to check would be fuel filter (just replace it if its more than 12months old they are like $6), check points gap and condition, plug gap and condition. it maybe wise to grab a bottle of fuel system cleaner it claims to help cold starting. that thing that sprays a mist of fuel into the carby when its not running is the accelerator pump. Edited May 28, 2008 by tas_ae71 Quote Link to comment Share on other sites More sharing options...
KE70+AE92 Posted May 28, 2008 Author Report Share Posted May 28, 2008 all i do is pump it a couple time and it will start i just replaced my fuel filter a couple weeks ago and no its not in good maintenance it my paddock basher :lolcry: it just annoying everytime u want to go for a drive and u have to do that Quote Link to comment Share on other sites More sharing options...
Raven Posted May 28, 2008 Report Share Posted May 28, 2008 he just answered that question raven :) Not quite, close though. He said he had to pump the arm, not the throttle. What I was asking is if he moves the throttle by hand, does the linkage move properly so that it pushes the linkage up which in turn makes the accelerator pump move down and then that squirts fuel into the the carby ;) Quote Link to comment Share on other sites More sharing options...
KE70+AE92 Posted May 29, 2008 Author Report Share Posted May 29, 2008 when i move the throttle it doesnt move the pump arm is it ment to? Quote Link to comment Share on other sites More sharing options...
philbey Posted May 29, 2008 Report Share Posted May 29, 2008 Yep. Should be an adjuster somewhere. I guess you get flat spots too if you stomp on the accelerator? Quote Link to comment Share on other sites More sharing options...
KE70+AE92 Posted May 30, 2008 Author Report Share Posted May 30, 2008 yeah i do have a flat spot expecially on a cold start if i press it too hard the revs will drop and it will stall but it gets better as the car warms up Quote Link to comment Share on other sites More sharing options...
Raven Posted May 30, 2008 Report Share Posted May 30, 2008 (edited) There should be a spring that sits over a linkage shaft to move that arm up when the throttle gets to a certain point (from memory). Wish I had access to my coupe so I could take a pic and show you what I mean. Edited May 30, 2008 by Raven Quote Link to comment Share on other sites More sharing options...
KE70+AE92 Posted May 30, 2008 Author Report Share Posted May 30, 2008 heres a pic of the thing i have to pump there is a spring which connects the throttle cord to the arm but it doesnt move the arm when u move the throttle Quote Link to comment Share on other sites More sharing options...
Raven Posted May 30, 2008 Report Share Posted May 30, 2008 (edited) See where the accelerator pump arm connects to the accelerator pump shaft? It looks as if the arm is already pushing down, that's why its not moving. :) plus the rubber seal is split around the top too. That small shaft has two positions where the pin on the accelerator pump arm slides through. Very carefully unbolt the arm from the top of the carby and slide said pin out of the accelerator pump shaft (which is part of the arm), spin the shaft around and put it through the other two holes. It should give it a new position and allow it to function correctly ;) Edited May 30, 2008 by Raven Quote Link to comment Share on other sites More sharing options...
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