replaced coil still no spark off coil - 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 04-30-2004, 09:39 PM
Member
 
Join Date: Jan 2003
Location: Milwaukee, WI
Posts: 45
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
replaced coil still no spark off coil

56 belair 235 straight six, just droped the engine in tonight and all is good but not spark off the coil have 12v on the power side and good ground. ok so i swaped it out with a coil i bought a while ago and still no go off the coil. do have voltage at the power side but kinda weak 9v when cranking could be weak battery but would that cause no spark hold the coil wire just off the coil and no jump spark and no zap to me. could i have two bad coils??? any ideas thanks Jim

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-30-2004, 11:43 PM
SPIIRIT's Avatar
Member
 
Join Date: Apr 2004
Location: California
Age: 85
Posts: 57
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
weak spark

Not likely both coils bad huh.....?

Put insulator between points and check across them with meter. If you get a reading then that is a problem...find the reason.

The coil needs a good ground to the chassis I would think, so check for that also.

Otherwise your lead from the ign. switch should become suspect. Also be alert for an intermittent condition which will will trick you if you're not on the alert for such shenanigans.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-02-2004, 07:35 PM
400C53F100's Avatar
Member
 
Last photo:
Join Date: Aug 2003
Location: Dover DE
Age: 74
Posts: 50
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
With your points open you should get ~12V on both sides of the coil. When the points close the (-) side of the coil should go to ground (0 Volts), and the (+) side should go to ~6 Volts. When you crank the motor or when it is running the (+) side alternates between 6 Volts and 12 Volts. When you measure this with a meter it will read ~ 9Volts. There is a resistor wire between the ignition switch and the plus side of the coil that drops 6 volts when the points are closed.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-02-2004, 07:38 PM
poncho62's Avatar
Out of the Loop Moderator
 
Last wiki edit: Streetbeasts links
Last journal entry: at car show
Last photo:
Join Date: Oct 2003
Location: Hanover, Ontario, Canada
Age: 62
Posts: 16,883
Wiki Edits: 5

Thanks: 20
Thanked 254 Times in 207 Posts
Are the points set properly?

About 17 to 19 thou, I think.
__________________
Ontario Rodders

Budget RVs
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-02-2004, 07:41 PM
400C53F100's Avatar
Member
 
Last photo:
Join Date: Aug 2003
Location: Dover DE
Age: 74
Posts: 50
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The coil should NOT be grounded. You said that you had a good ground. The (-) side of the coil only goes to the points. The points supply the ground.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-02-2004, 07:48 PM
crazy larry's Avatar
Member
 

Last journal entry: better comparison before and after shots
Last photo:
Join Date: Oct 2002
Location: East Texas
Age: 43
Posts: 2,298
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i say the points aren't opening.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-03-2004, 01:13 AM
Kevin45's Avatar
Just one of the guys
 

Last journal entry: Garage Toys
Last photo:
Join Date: Jul 2002
Location: Urbana, Ohio
Age: 58
Posts: 3,058
Wiki Edits: 0

Thanks: 1
Thanked 15 Times in 15 Posts
replace the condensor also.

Kevin
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-03-2004, 03:17 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
No Spark...

Hi

Doc here

Do you like, have spark at the Points? set it on a closed lobe, turn the key on and using an INSULATED screwdriver open and close the points...Spark or no??

And here is one I do so very well...I get like...soooo easily distracted by shiny objects....Pretty women....long legs...headlights on the horizion...Did you really actually remember to put the rotor in when you were last in there??...I know...I know....But hey...My Road doggie is Murphy...Didn't know Corvette made a Gremlin...Till I bought a few of them...

Coil Should Be Case Grounded....(not the minus side which should head off towards the points) The 9 volt readings should be about right given the current limiter wire/resistor.

Try a new Coil wire...These Guys go bad just cuz.....Female by Nature I think...need I say more??

I'm thinkin' back to the 'Ol Stovebolt Engine here...(this requires selective endorphin triggering...) Didn't they have a Ground wire that attached to the pivot point screw on the points? And if so, Is that hooked up? And/or....Are the points getting a good ground?

Another AC Delco/General Mystery Trick...To aid in the Manic Depression of product owners...They Sometimes put a clear sleeve on the point pivot to hold the points open for shipping I think...(therefore I have headaches..) Could this be the case? Are the points actually opening and closing?

And the terminal block, the little screw port on the points, is the plastic receiver seated all the way in...and not shorting to the pivot arm ground...(This has happened to me on V8 General mystery's before ... Not sure if the sixes are configured the same way.)

And here's one from the "I don't really want to hear about it files"...Like...is the distributer Actully Turning??...maybe not seated During the rebuild?...(REF:above.. Me...shiny objects..headlights...)

I'm assuming you haven't gotten to cranking spark yet...but if this is where you actually are losing it...look at the secondary Ignition circuit.

Hope that Helps Some...
Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-03-2004, 04:39 PM
daimon1054's Avatar
Member
 
Join Date: Oct 2003
Location: Louisiana
Posts: 496
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
What are points?

I thank the lord every day for electronic ignition, I hated points
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 05-03-2004, 10:24 PM
poncho62's Avatar
Out of the Loop Moderator
 
Last wiki edit: Streetbeasts links
Last journal entry: at car show
Last photo:
Join Date: Oct 2003
Location: Hanover, Ontario, Canada
Age: 62
Posts: 16,883
Wiki Edits: 5

Thanks: 20
Thanked 254 Times in 207 Posts
Nothing wrong with points, if you know how to set them up...........makes it a bit more fun IMHO.
__________________
Ontario Rodders

Budget RVs
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 05-05-2004, 05:29 PM
Member
 
Join Date: Jan 2003
Location: Milwaukee, WI
Posts: 45
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
good news is i just grabbed the distruiter off the old engine and it is new electroic and hei coil hooked up and all is good went back looked at the old dis the dam points was staying closed im a dumb *** should have looked at the easy things first thanks for the input Jim
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 05-12-2004, 12:19 AM
SPIIRIT's Avatar
Member
 
Join Date: Apr 2004
Location: California
Age: 85
Posts: 57
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
closed points

Jack...you should be shot outright!....LOL!
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



All times are GMT -6. The time now is 07:01 PM.


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.