Hey everyone. I have a stock holley carb on my 306, and I was wondering if you need the little rod connecting the throttle to this little secondary lever? I do not know very much about carbs (or anything too technical with cars) so any help you guys have is GREAT!!!!

 

NM!!!!!! Just called the guy who sold the engine to me. He explained it all to me....

 

.... This carb trouble is driving me up the wall. Ok does that little pin going from the throttle lever to the secondary lever open the secondaries up? I know it is a vacume secondary carb, but I was looking at some roterjets at my friends, and they were to. Anyways even though they were square bore carbs (vac 2nd's) this little pin pulled the secondaries wide open.... I was told that the pin is to close the secondaries, so the pin isn't needed. Also it sputters and hesitates all the time. I've tried tuning it 3-4 times now, and nothing helps.. Any help will be awesome, thanx for any hits!

 

Bueller? Bueller?.....

 

Pics would help, your posts are not very clear. Sounds like the carb needs to be rebuilt and tuned by someone who know what they are doing.

 

Ok. The best i can do is tell you to look on holley.com. There should be a nice big veiw of the carbs throttle linkage. Its a little pin that goes from the linkage to the secondary lever... It's on every other carb on the site, vacume 2ndaries, and manual. As for the tune, its 2 screws hi and low....... you back them in, than turn them out 1 1/4 turnes out (on each side).....I could do this all day and nothing changes. I most likely have a vacume leak that is causing the car to stumble when I smash the gas. Tuning a carb is basic.The only think I CAN'T do is set the accellerator pump becuase i dont have a feeler gauge that reads below .045........I need one that is .015. Soif anyone knows carbedcars, you should know what I'm talking about. I would take it to"someone who knows what they are doing" butI built this car myself, and I like to fix it myself so when or ifI have this problem, I can fix it.Anyone have any idea's??????

 

I have the part # and a site link. part#20-65 and http://www.holley.com/20-65.asp...... This is the shaft I DO NOT HAVE. Is it opening my secondaries, or is it just to shut them. I havent seen them open yet off of vacume. If anyone has any idea of what I'm talking about, please feel free to give me your opinion. Thanx for your any hits,or info!

 

I cant view the link at work[:@] stupid web blocker.....Anyway, if its the shaft that looks like it connects from the primaries to the secondary cam, yes it needs to be there. That is meant to allow the secondaries to only so far in relation to the primaries. Basically its there so the secondaires dont open too much. That rod also holds the secondaries shut. If that rod is not there, anytime there is a high vacuum signal the secondaries will open. With out any relation as to what the primary circuit is doing. Itll cause really bad runability problems.
-P.

 

I was just told by the owner of a local speed shop that my carb is a peice of **** from the get go. He said they leaned them out so much to pass the e-test that they ran like **** no matter what the tune was. He was also saying that the shaftopens the secondaries like you were saying, and closes them also. Anywho, he has a used carb he just re-built lastnight, and he's holding it for me untill I can make it out there somtime in the next couple of days. Thanx for your helpPZero, JD1969, and anyone who looked over my thread.This forumkicks A$$. THANX!!!!!!!