Join Date: May 2004
Location: kansas city, mo
all righty then. it's been a looong time since i messed with carbs. but here goes. i'm sure somebody with more current carb experiance will chime in later, but for now...
1) only pump the pedal once to set the choke. and then just a light to medium tap is all thats needed to set the choke. you may be flooding the motor, hence the bogging or wild rpms. is the double pump a habit you had before the rebuild? try starting it without touching the pedal.
2)rebuilt 1 month ago vs. starting having these problems about 1000 miles ago. seems to me these might be related.
3) the accelerator pump will pump out all the gas in it's chamber/well in one or two strokes with the motor off. this is normal.
4) check your choke, throttle blades and linkages for any kind of binding. are the throttle blades centered in the bores, or are they hitting off to the sides. if you back the idle screw off they should close dead center with no gaps anywhere.
did you remove the throttle blades from the shaft?? if so you may have put them on upside down. the edges are beveled to only fit one way.
it's possible you have a linkage not installed correctly, or the throttle blades are hanging up
have you changed air cleaners? check for any binding between the linkage and the air cleaner. try starting with and without the air cleaner.
that's about all i can think of for now. check this stuff and maybe by then one of the carb experts will chime in with some more things to check.
BELIEVE IN YOUR DREAMS
1969 SS X55 NOR added RS all NOS sheetmetal, ground up resto. 24 year project and dream. optioned out the wazoo. in one thousand pieces, and coming together finally.