Off idle shudder

[Hibbing_Coronet_500]

We have results! I backed the vacuum advance can CCW several turns. I moved the vacuum hose to the upper port. and I started the car. It ran like crap! I could not get the car to run for nothing.
I disconnected the vac advance. Reset timing to 8 before TDC. Reset mixture screws to 1 1/2 turns. It runs bad. I think I now have either a bad vacuum leak or I sucked some crud into the carb.
It surges at idle really bad. when I cover the carb opening the engine races and smooths out.
I ran the car anyway down the same strip of road with the vacuum advance hooked up and that ping is GONE!

As far as a vacuum leak? I dont see how I could get one over night. Just two hoses. one for PCV and other to distributor.
In a few minutes Im going to go blow oit the idle mixture ports and run some carb cleaner in there and re run the car.

[Hibbing_Coronet_500]

Id like to thank Mopar and Missles for the solid information I got today.
As I see it now. I have or should I say had 3 different problems.

#1. I was using the wrong vacuum port for my Vacuum advance. Thanks Mopar / Missles for the heads up.
#2. I was adjusting the vacuum advance the WRONG way Thanks MP instructions, resulting in part throttle PING. I disconnected the vacuum advance due to the PING creating a drivability issue with plug fouling.
#3. Lastly. the annual EDELBROCK Carb rebuild. I went to my local auto parts store today and ran into a Mopar racer buddy. He heard me pull in and said your Edelbrock needs a rebuild. Up / down idle and surging in gear. ( That just started this morning )

Im looking forward to tweaking the vacuum advance and timing AFTER I get the carb rebuilt because I know there are gains yet to be had!

Im a happy Dude.

[ws27]

Great to hear!

[mrconvertible]

When rebuilding the carb, take a good close look at the throttle shafts for excessive wear that may also be contributing to an intermittent or variable vacuum leak. I don't remember which car I owned that had that problem but I remember it was a bear to figure out. Good Luck!

[Hibbing_Coronet_500]

Just a lil update.
Rebuilt the carb using the PFCI brand carb kit.
Car runs better. Still a little shutter. But I took all the vacuum advance out of it. Going to make adjustment to sneak up on the best setting.
Car is still on jack stands. I welded in one of my new mufflers on Saturday. Sunday woke up with a case of Metal Fume Fever.
Feeling like crap today as well. Didn't look like galvanize pipe?
Hope to be street tuning by mid week.

[65rbdodge]

I`m not sure if you had read my first post since I edited it but this a common problem with edelbrock carbs, -GOOGLE THIS- edelbrock off idle stumble lots of info on this

[Hibbing_Coronet_500]

Will do