Six Pack issues and rebuilding by tommyg29

3 minute(s) of a 193 minute read

11-27-2014

Happy Thanksgiving!

My Holley stuff from Summit arrived yesterday so this morning put my primary back together with 35 PV, 64 jets and replaced one of the idle screws.

I noticed none of my idle screws were identical. The points on them were different, and even slightly different lengths. Crappy production quality?

I decided to use the two middle screws as they were most similar and had decent points on them. The one on the left had no point. New ones are on the right.

Not sure if these screw changes made much difference but after putting things together it seems to be running better, and idling with a small hunt between 850 and 950 rpm or so. 

Vacuum is fairly steady about 10 inches at 900 rpm (give or take same as before) but vacuum drops quickly and gets very erratic once rpm drops to 800 or below.

Took some fiddling but my screws are out a little more than before, from about 5/8 turn to about 1-1/8 turns out. Seems to run decent there, but still doesnt want to start right up again after its been running a while. Have to let it sit a good 5 minutes before it will start.

Also checked timing and it seems to be about 14/32. Its a MSD6AL system so Ive never fiddled with it.

I'm getting closer.   

Thanks.

Its not so much sticktuativeness though.

Ive been dragging on this because I havent had a lot of motivation. I have had lots of time to research and ask questions though!

This thread has been a LOT of help and I hope someone else can learn from this and all the pictures Ive taken.

Looking back its been trial and error (mostly error) and shots in the dark, but knowing what I know now, theres no reason I couldnt have done it all in a few days. Heck, rebuilding the carbs and tuning them can possibly be done in an afternoon if everything goes right. But it never does.