The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 11-23-2008, 10:12 PM   #1
tcb-1
Nothing to see here.....
 
tcb-1's Avatar
 
Join Date: Jun 2007
Location: Shawnee, KS
Posts: 4,625
Exclamation Distributor Experts, HELP PLEASE!!!

I think I found my problem, but would like to run it past you all before I go any further.

I have a '69 C-10 with a bone stock 350 running a points ignition.
new plugs gapped to .035"
distributor cap and rotor look good
points gapped. new coil and plug wires
no arcing when the lights are out
fresh gas, new inline fuel filter
carb is a fairly new 1405 Edelbrock with manual choke
choke is closing

it starts like a champ, and idles up to 1000rpm, but when I try to increase the rpm, it starts to stutter severly. when I kept the foot in it to "see" if it cleared out, I da#n near blew my Flowmasters apart. so there is major gas dumping straight into the exhaust. I haven't timed it, but will tomorrow.

so tonight on a thought, I check the vacuum advance. I hook up suction to the vacuum unit. it would not hold vacuum and it didn't move the advance plate any. so I take it out and tear it apart and sure enough, the vacuum unit's diaphram is split.

now....... other than timing, would a trashed vacuum advance cause my symptoms? anything else I'm missing that obvious? I don't think I have a sticking valve, but I guess I should do a compression check.

other than "natural causes", why would a vacuum advance go South?

need help guys, bigtime
__________________
Doug

THANK YOU to our American Soldiers & Veterans - POW MIA "You will NEVER be forgotten".

The democracy will cease to exist when you take away from those who are willing to work and give to those who would not. Thomas Jefferson

Last edited by tcb-1; 11-23-2008 at 10:15 PM.
tcb-1 is offline   Reply With Quote
 

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com