Corvette electric choke problems - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 03-30-2007, 07:25 PM
Registered User
 
Join Date: Mar 2007
Location: New York
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Corvette electric choke problems

Hello! My 1980 corvette has electric choke issues, and I'm quite the rookie. With the ignition key turned to the on position, I have current at the electric choke connection at the carb. However, as soon as the engine starts, the current cuts out, leaving me with a closed choke and a very lean burning engine. Is this normal? Shouldn't the choke stay on when the car is running? If so, what's wrong, and how can I fix it? Probably a simple fix for the experts, but I am a novice, so any help would be greatly appreciated!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-31-2007, 11:31 AM
vicrod's Avatar
life is a ride
 

Last journal entry: 2014
Last photo:
Join Date: Nov 2005
Location: Telford, PA
Age: 71
Posts: 1,341
Wiki Edits: 0

Thanks: 0
Thanked 59 Times in 55 Posts
13 to 14 volts must be present at the choke at all times when the engine is running.
Use a voltmeter or a test light to determine if this is the case.

If voltage is NOT present at the choke there could be a blown fuse, bad connection at the fuse block or the firewall or a broken wire.

If voltage IS present at the choke check for a bad ground at the choke terminal and ground connection point.

The choke heater element wire could be bad. Use an ohmmeter set at OHMS x 0 to check for continuity of the choke element by disconnecting the 2 wires and testing across the terminals on the choke housing. If the meter reads infinity the choke heater wire is bad.

vicrod
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-31-2007, 01:13 PM
vicrod's Avatar
life is a ride
 

Last journal entry: 2014
Last photo:
Join Date: Nov 2005
Location: Telford, PA
Age: 71
Posts: 1,341
Wiki Edits: 0

Thanks: 0
Thanked 59 Times in 55 Posts
Quote:
Originally Posted by JG700
Thanks for the help! I tried your suggestions -power at the choke only when the key is turned on (just before start), but no power when started and running. Fuse is good, choke is new. I have no idea what's wrong.

JG700



Checking the manual I see that somewhere around that year GM added a relay called "choke heater relay". Also they added an instrument light labeled "choke heater".
Is that what you have?
The relay contacts are normally closed and powered open by the brown wire from the alternator which also lights the "gen" lamp. This wire becomes hot if the alternator is not working.
It sounds like the relay is working but is being powered up by the alternator thus turning the choke heater off.
Is the instrument light working? It will be on when the choke heater is on.
Is the alternator working OK?
As a test try to disconnect the brown wire "connector" at the alternator to see if the choke heater stays on.

vicrod
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-01-2007, 06:32 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

Here is the diagram for an 80 vette choke heater.



It may be you have the mechanical adjustment backward..the choke is actully open when cold (or no power to the relay) bump the throttle on a non running COLD engine see if it opens..If so turn the choke heater until the choke closes..that should set it right.

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-01-2009, 06:10 AM
Registered User
 
Join Date: May 2009
Location: central east new york state
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
choke ideas

I was having problems with mine too, it never seemed to open properly and when it did it wouldnt close. keep in mind this was also a replacement sometimes if you just need the car to run you can go with the manual choke seems to work fine for me. that is if you dont mind screwing new things to your dash. my 80 already had a manual installed at one point before i bought it. the other thing i was considering is putting in another elect. choke connected to a potentiometer so that its both electric AND manual because running the steel control cable in a way that it works properly is tricky. does anyone know the ratings for the choke (vltg, amps, etc.) so i can figure out if my idea is even feasible. i dont wanna end up burning anything out.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-01-2009, 07:32 AM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,840
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
Please check the last post date when responding to a post. The last date was 2007, if this guy has not fixed his choke by now he probably never will.

Vince
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
1979 corvette ignition problems daveboone Electrical 2 08-21-2006 06:28 PM
C-5 corvette headlights problems SSon18s Electrical 3 05-02-2006 06:14 PM
On Q-Jet Can a hot air choke convert to Electric Auto-Part Engine 11 12-05-2003 04:23 PM
Electric Shift Problems Benji Electrical 1 05-24-2003 09:47 AM
Plumbing, Vacuum, and Electric Choke rhino_64 Engine 4 06-02-2002 11:22 PM


All times are GMT -6. The time now is 12:07 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.