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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 12-15-2004, 12:02 PM   #1
TrainD5115
North Coast, baby!
 
TrainD5115's Avatar
 
Join Date: Jun 2004
Location: Toledo, OH
Posts: 437
outside vacuum source

Okay, my tuning manual says to set the rear vacuum diaphragm using an outside vacuum source. What or how do I accomplish this? I am trying to dial in my 79 rochester M4MC 4bbl carb. It has a non electric automatic choke which is giving me fits right now. It fires up good but starts to stumble bad after a few seconds. After about a minute or two it will "correct" itself and run fine. I seem to be getting bad fuel economy as well. Any ideas?
__________________
Brad
79 Scottsdale C20
350/350
3.73's
Still running full CA smog gear!
TrainD5115 is offline   Reply With Quote
 

Bookmarks


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 02:22 PM.


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