Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 General
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C3 General
General C3 Corvette Discussion not covered in Tech Sponsored by
Corvette America

Reply
 
 
 
 
Thread Tools Search this Thread
Old 07-04-2013, 10:17 PM   #1
tomurne
Junior Member
 
Member Since: Aug 2012
Default '78 L82 will not idle when warm

Hoping someone can help me out on this..
'78 L82, automatic with Elgin Pro stock cam E1067; .325/.340 cam lift, .488/.510 valve lift, .300/.310 Adv. duration, 234/244 .050 dur.
It has a 600 cfm Edelbrock carb (1406).
Here's the problem:
Starts good, runs good until it gets warm (180 degree thermostat - and that's about where it runs). It seems as though when I'm running it down the road and come to a stop sign, the idle drops to around 700 rpm - which is fine - it doesn't kill. However, when I just let the car lug around at idle speed (foot off the accelerator) for a short distance then come to a stop, the idle drops way off and it kills. If I catch it quick enough and shift into P or N, the idle will pick back up to 1000 rpm (normal idle rpm). If not, I have to restart it and to get it to start I have to pump the accelerator once.
I've checked for vacuum leaks - isolated all vacuum lines - to no avail.
Power tuned timing at 3000 rpm.
Any knowledgeable advice is greatly appreciated. I've been battling this for a couple years now. Thanks
tomurne is offline   Reply With Quote
Old 07-05-2013, 12:46 AM   #2
oldalaskaman
CF Senior Member
 
oldalaskaman's Avatar
 
Member Since: Aug 2010
Default

turn your rpm up to 750
oldalaskaman is offline   Reply With Quote
Old 07-05-2013, 04:25 AM   #3
jesse10886
CF Senior Member
 
jesse10886's Avatar
 
Member Since: Oct 2011
Location: long beach California
Jimmie Bussart
Default

Quote:
Originally Posted by oldalaskaman View Post
turn your rpm up to 750
jesse10886 is offline   Reply With Quote
Old 07-17-2013, 10:36 PM   #4
tomurne
Junior Member
 
Member Since: Aug 2012
Default

Just like to pass along what I found cured my issues: installed a 3/4" spacer block (I used phenolic) under the carb. Hope this helps someone else.
tomurne is offline   Reply With Quote
Old 07-17-2013, 10:36 PM
 
Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 General
Reload this Page '78 L82 will not idle when warm
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Idle question related to automatic tranny CaseyJones C3 Tech/Performance 8 11-16-2013 08:12 PM
Question for 82 idle quality? alconk C3 Tech/Performance 4 10-15-2013 08:11 PM
average L-79 vacuum gauge reading and idle questions timmah22 C1 & C2 Corvettes 16 10-12-2013 07:10 PM
P0336 weird problem.. Neez C5 Tech 1 09-10-2012 03:18 PM
Idle drops too low tomurne C3 Tech/Performance 5 08-06-2012 10:42 PM



Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
 

All times are GMT -4. The time now is 08:51 PM.


Emails & Password Backup