Classic/Antique Car Repair: Holley Carb 3814, mike urich, holley carb

Question

cam and linkage Dick

I have a Holley carb on a 67 corvette.  The fast idle and the choke to not function.  The car accelerates and idles just fine.  I have owned the car for five years and the fast idle and automatic choke did not function when I purchased the car.

The number on the horn of the carb shows 3906635-OP and the list is 3814.

I have purchased a Holley tuning manual for a model 4150/4160 by Mike Urich and Bill Fisher, but this book does not show the detail of how to set the fast idle and adjust the choke. From the manual the type of choke on this carb is referred to as a divorced or remote choke.  The linkage from the choke is attached to a bi-metal spring on the manifold.  When I fully depress the accelerator the choke does not close at any outside temperature.  I currently have the carb off of the car.  I have also noted that when I fully stroke the accelerator to wide open throttle, the white plastic cam is never contacted.

I have send a picture of the cam and linkage that I hope will provide you some insight into my situation.

Thanks for taking the time to review this message.

I suspect that this carb has been disassembled and not properly assembled.

The

Answer
There are too many possibilities here for me to try to think of all of them.

My experience with rebuilt carburetors is VERY poor- I always rebuild them myself.  I have found that the kits are very good in telling you exactly how to set them up, including everything you will need to correct whatever errors were made by the last person who worked on your carburetor.

My advice is to go to your local NAPA store and buy the rebuilder kit for this carburetor, then take the instruction sheet and perform every step of the procedure, taking special care to read carefully and make sure all the parts are assembled in the correct order and position. Make all the adjustments given in the instructions - and you will have a carburetor that performs correctly for a long time.  You probably won't need to use any of the parts in the kit if you are careful not to damage any gaskets - so save the kit until the next time it needs attention - which will probably be years in the future.

Dick