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


Reply
 
Thread Tools Display Modes
Old 08-07-2014, 11:33 AM   #1
zibs71
Registered User
 
zibs71's Avatar
 
Join Date: Jan 2013
Location: Alberta, Canada
Posts: 132
running issues

Good day fellow members of this great site. I have a issue with my 71 chevy C10 . I just replaced carb (Elderbrock 1406) and intake 2101 also Elderbrock. Ran very well for a week. Went to drive truck the other day started well and after about 30-45 second would just run really rough and stall unless I worked the gas. It does this now everytime. Not sure why? It has a 350 engine. Also blue smoke with I think mean gas. Any thoughts?


Zibs71
zibs71 is offline   Reply With Quote
Old 08-07-2014, 11:45 AM   #2
knomadd
Registered User
 
knomadd's Avatar
 
Join Date: Jul 2012
Location: Rosenberg, Texas
Posts: 3,506
Re: running issues

Blue smoke usually means oil burning. Black or dark grey is carbon build up from running too rich of a fuel mixture.

Pull your spark plugs and take a look at them. Look up "how to read spark plugs" and try to determine what's happening. I bet your plugs are fouled.
__________________
-Duane

C/10 Club Texas member
1971 Chevy C10 "Brutus" SWB Fleetside 2016 6.0L (L96) 6L90E (driver/project)
1965 Pontiac GTO "Royal Goat" 400/TH400 w/AC (my baby)
knomadd is offline   Reply With Quote
Old 08-07-2014, 11:53 AM   #3
zibs71
Registered User
 
zibs71's Avatar
 
Join Date: Jan 2013
Location: Alberta, Canada
Posts: 132
Re: running issues

Thanks for the fast reply. I've just changed plugs not long ago. Could it be possible bad plug(s)?


Zibs71
zibs71 is offline   Reply With Quote
Old 08-07-2014, 12:37 PM   #4
knomadd
Registered User
 
knomadd's Avatar
 
Join Date: Jul 2012
Location: Rosenberg, Texas
Posts: 3,506
Re: running issues

Probably not bad, but maybe. I'd pull a few and see if then look fouled. If not, then it's probably not your plugs. How old are your plug wires? Cap and rotor on your distributor? Is it HEI or points? When was the last time you have the dizzy a tune up? Sounds like ignition may be a problem, but it could also be fuel or vacuum.

Since you replaced the intake, I'd start with ignition, then look for vacuum. Fuel would be my last item I'd look at.
__________________
-Duane

C/10 Club Texas member
1971 Chevy C10 "Brutus" SWB Fleetside 2016 6.0L (L96) 6L90E (driver/project)
1965 Pontiac GTO "Royal Goat" 400/TH400 w/AC (my baby)
knomadd is offline   Reply With Quote
Old 08-07-2014, 01:21 PM   #5
Hugh Mongus
Registered User
 
Join Date: Jan 2014
Location: Tulsa, OK
Posts: 360
Re: running issues

Sounds like a vacuum leak.
__________________
-Jason
USN Retired
Hugh Mongus is offline   Reply With Quote
Old 08-22-2014, 10:06 PM   #6
zibs71
Registered User
 
zibs71's Avatar
 
Join Date: Jan 2013
Location: Alberta, Canada
Posts: 132
Re: running issues

Well got it figured out . Took out needle and seat and cleaned kinda seems to be fine now . Was really concerned cause just had changed intake an carb a couple weeks before. Thanks for all the help ppl.

Zibs71
zibs71 is offline   Reply With Quote
Old 08-23-2014, 12:23 AM   #7
MagmaJct
Registered User
 
MagmaJct's Avatar
 
Join Date: May 2008
Location: Mesa, AZ
Posts: 281
Re: running issues

Did you go from the 1406 or to the 1406?

I learned the Carter AFB (what I have) does NOT have its own filter. I had to install an external one.

I found out by seriously flooding the engine. Fortunately, no damage.
__________________
I own 3 classic vehicles. 1971 LWB C10 Deluxe. 1974 VW Super Beetle. 1971 VW Fastback.

The C10 and the Super Beetle run, the Fastback is just not there yet!

Please visit my Super Beetle and Fastback profile on TheSamba.
MagmaJct is offline   Reply With Quote
Reply

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 08:59 PM.


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