HERE IS AN UPDATE...



Disconnected the electric choke wire, just to be sure.

Car fired right up and ran fine.

Let it warm up for a few minutes then backed out and headed around the block.

Put in D1 (low) and pressed lightly on the gas.

Car sputtered and ran real rough.

Pressed further downward it smoothed out a bit.

Put into D2 and smoothed out.

Pressed on gas and it began to sputter and lunge a bit.

Let off gas and pressed again slowly and it was fine.

Drove up the street and began to speed up.

It started to sputter again so I pressed harder, it continued to sputter only more aggressively.

Backed off gas and it smoothed right out.

Pressed down slowly and it seemed to be OK.

Pulled back into garage and put into park.

Stepped on gas and it sputtered again.

Let off and it idled just fine....



Checked fuel filter and it still is clean. Does this help anyone pinpoint a direction I might head?



Appreciate your help as always.

1957 Thunderbird

312

Book calls for .014- .016 Always have used .015. Funny thing is last week drove it all weekend and did not have a problem. Started it Sunday, to go to church, and it started acting up.



You think a wider gap would be in store?

1957 Thunderbird

312

Its been forever since I looked it up - is .015" OK for a single point gap? On a v8, that can't be a heck of a lot of dwell (time) to charge the coil. A low charge time and less than "stiff" electrical feed to the coil would make for a pretty anemic spark.

 
 Steve Metzger       Tucson, Arizona

Ted,

It has been hooked up this way for some time without a problem but did short the wire when it touched the manifold some time back.  Replaced the wire and never thought anything else about it.  I guess it the coil etc. are getting old this could have an impact couldn't it?

Rod

1957 Thunderbird

312

The hot wire for the choke coil does need to be routed to a different source rather than being piggy backed on top of the ignition circuit.  Hooking the choke wiring to anywhere on the ignition circuit whether it’s at the resistor or the coil makes for a voltage drop to the coil and in turn creates the potential for the sputtering you mention.  As Mark mentions, simply unhook the choke wire temporarily while repositioning the choke coil so the choke is open all the time and see if this fixes the problem.

Lorena, Texas (South of Waco)

 

Thanks for the link.  I will review and see if that answers my 2nd question.  Should have thought to go there first....

1957 Thunderbird

312

  Yea a Weber... I know not an original Holley but it sure is easier to adjust and more dependable (probably just started a holley war here..get it???)  OK...

I was thinking of hooking the wire up to the supply side.  Should be the same amt of juice.

On the stuttering portion.. I noticed it got progressivly worse throughout the day...

Rod

1957 Thunderbird

312

Rods,

Just a thought , but why not run your power wire( for the electric choke )from the hot side of your coil ???? Saves  running a wire all the way back to your ignition switch .It will only operate when you turn the key on . You can still put a inline fuse in  if you wish .Just a thought ???????????

Lon

yblocksdownunder

This manual ought to help figure out the choke ......

http://www.edelbrock.com/automotive_new/mc/carbs_acc/pdf/carb_owners_manual.pdf 

.......and yes a whole lot of carburetor designs are licensed from Weber.

 
 Steve Metzger       Tucson, Arizona

Edelbrock carburetors have the Weber name on them.


Lawrenceville, GA