| [GMCnet] No spark: need help [message #138483] |
Thu, 11 August 2011 15:02  |
SergeL
Messages: 169
Registered: January 2011
Karma: 0
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Senior Member |
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Original Post: After running great, the gmc quite running, the post was
under "need some help"
1: Plenty of gas
2: carb has gas in chamber
3: turns over will not start will not even attempt to start.
Today
1: no spark at plugs
2: 12 v going into distributor OK
Problem: PO installed a what I believe is a solid state distributor, I don't
see a coil except for what looks like one built into the distributor cap.
Since my manuals don't have this type of distributor, I don't know what to
look for.
1: the rotor turns
2: no cracks or anything broken on inside
3: Did not make any kind of noise whenb it quit running just quit like I had
turned off the ignition.
Any one that can help on what for me to test?
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| Re: [GMCnet] No spark: need help [message #138486 is a reply to message #138483] |
Thu, 11 August 2011 15:14  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Serge, it is more than likely an ignition module. But first, carefully check
the plug in connector that goes into the distributor cap. The primary wire,
the one that comes from the ignition switch, frequently becomes loose in the
multipin connector at the cap. I surmise from your comment about coil in cap
that you have a later model GM HEI ignition. There is an electronic module
mounted in the place that we used to find breaker points. Remove the old
one, and take it with you to the auto parts supplier, qnd get one that
matches what you have. Be sure to get some heat sink grease to place under
the new module when it is installed. Don't forget this step. The module will
burn out very shortly if it isn't used.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Thu, Aug 11, 2011 at 1:02 PM, Serge Leduc <greatmoments60@hotmail.com>wrote:
> Original Post: After running great, the gmc quite running, the post was
> under "need some help"
>
>
> 1: Plenty of gas
> 2: carb has gas in chamber
> 3: turns over will not start will not even attempt to start.
>
> Today
>
> 1: no spark at plugs
> 2: 12 v going into distributor OK
>
>
> Problem: PO installed a what I believe is a solid state distributor, I
> don't
> see a coil except for what looks like one built into the distributor cap.
>
> Since my manuals don't have this type of distributor, I don't know what to
> look for.
>
> 1: the rotor turns
> 2: no cracks or anything broken on inside
> 3: Did not make any kind of noise whenb it quit running just quit like I
> had
> turned off the ignition.
>
>
> Any one that can help on what for me to test?
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] No spark: need help [message #138488 is a reply to message #138483] |
Thu, 11 August 2011 15:20 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| Serge Leduc wrote on Thu, 11 August 2011 16:02 |
Original Post: After running great, the gmc quite running, the post was
under "need some help"
1: Plenty of gas
2: carb has gas in chamber
3: turns over will not start will not even attempt to start.
Today
1: no spark at plugs
2: 12 v going into distributor OK
Problem: PO installed a what I believe is a solid state distributor, I don't see a coil except for what looks like one built into the distributor cap.
Since my manuals don't have this type of distributor, I don't know what to look for.
1: the rotor turns
2: no cracks or anything broken on inside
3: Did not make any kind of noise when it quit running just quit like I had turned off the ignition.
Any one that can help on what for me to test?
|
Serge,
I bet PO put in an HEI distributor and the coil is in the cap.
Look at the thread one down, because this is common issue with HEI distributors. The module in the bottom dies.
Replacements are usually easy to get (Gee - I wonder why).
I don't have one and don't remember how to make a positive diagnosis, but someone will be by that does, and if you have not changed it out by then, he might be of help.
When you change it out, remember the thermal goo on the bottom or the new one won't last long.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] No spark: need help [message #138496 is a reply to message #138483] |
Thu, 11 August 2011 15:41 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Where are you located?
Ray
Ray & Lisa Erspamer
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
----- Original Message ----
From: Serge Leduc <greatmoments60@hotmail.com>
To: "gmclist@gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Thu, August 11, 2011 3:02:29 PM
Subject: [GMCnet] No spark: need help
Original Post: After running great, the gmc quite running, the post was
under "need some help"
1: Plenty of gas
2: carb has gas in chamber
3: turns over will not start will not even attempt to start.
Today
1: no spark at plugs
2: 12 v going into distributor OK
Problem: PO installed a what I believe is a solid state distributor, I don't
see a coil except for what looks like one built into the distributor cap.
Since my manuals don't have this type of distributor, I don't know what to
look for.
1: the rotor turns
2: no cracks or anything broken on inside
3: Did not make any kind of noise whenb it quit running just quit like I had
turned off the ignition.
Any one that can help on what for me to test?
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] No spark: need help [message #138500 is a reply to message #138496] |
Thu, 11 August 2011 15:48 |
SergeL
Messages: 169
Registered: January 2011
Karma: 0
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Senior Member |
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I am not broke down anyplace, I am at home if that is why you asked, just
working on my own little beast
Thanks
Serge
1973 GMC
Deming, NM
He who expects no gratitude shall never be disapointed
-------Original Message-------
From: Ray Erspamer
Date: 8/11/2011 2:41:36 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] No spark: need help
Where are you located?
Ray
Ray & Lisa Erspamer
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
----- Original Message ----
From: Serge Leduc <greatmoments60@hotmail.com>
To: "gmclist@gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Thu, August 11, 2011 3:02:29 PM
Subject: [GMCnet] No spark: need help
Original Post: After running great, the gmc quite running, the post was
under "need some help"
1: Plenty of gas
2: carb has gas in chamber
3: turns over will not start will not even attempt to start.
Today
1: no spark at plugs
2: 12 v going into distributor OK
Problem: PO installed a what I believe is a solid state distributor, I don't
see a coil except for what looks like one built into the distributor cap.
Since my manuals don't have this type of distributor, I don't know what to
look for.
1: the rotor turns
2: no cracks or anything broken on inside
3: Did not make any kind of noise whenb it quit running just quit like I had
turned off the ignition.
Any one that can help on what for me to test?
_______________________________________________
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Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] No spark: need help/ Thank You [message #138549 is a reply to message #138547] |
Thu, 11 August 2011 18:54 |
SergeL
Messages: 169
Registered: January 2011
Karma: 0
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Senior Member |
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Thanks for all your help, I had never worked on a vehicle with HEI prior to
today, now I think I know more than I can understand.
The coil was the culprit and not the module although I now have a spare
module.
Thank you so much for all your input and help.
I love this group and I find it a real blessing to be a part of it.
Serge
1973 GMC
Deming, NM
He who expects no gratitude shall never be disapointed
-------Original Message-------
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