GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » [GMCnet] Fw: Re: engine quit, then restarted itself
[GMCnet] Fw: Re: engine quit, then restarted itself [message #346303] Sat, 10 August 2019 01:29 Go to next message
rallymaster is currently offline  rallymaster   United States
Messages: 662
Registered: February 2004
Location: North Plains, ORYGUN
Karma: -4
Senior Member

While driving fown the road the coach engine quit, then restarted itself.
This happenedd several times in aa 6 month period. A couple of time it
died while I was moving slowly, and failed to restart itself.
Putting the tranny in neutral and turning the key did the trick.

There were a few more possible causes suggested, but good old JUNO ate
them before I could check them out, and I don't remember what they were.

Jim's suggestions about connectors in the distributor and the steering
column didn't cure the problem.
If anyone can come up with more possibilities, I'll try to save them
outside of JUNO, so its insatiable appetite can't get them.
I reeely don't want the lady to quit in traffic and not strand us.
Thanks,

Ron C



Ron, more than likely a electrical issue. Probably a loose connector in
the
ignition circuit. If you have HEI, I would remove the coil cover on top
of
the cap and check the plug in connections. That is a frequent offender.
Other places to inspect is where the ignition primary circuit starts at
the
base of the steering column. There is a multi-pin connector there that is
vulnerable to shoes and stuff like that. Also, the starter solenoid where
the starter primary wires hook up.
Jim Hupy

On Wed, Jun 5, 2019, 5:11 PM Tom Newell via Gmclist

wrote:

> Every old thing I have owned has done this at some point (except the
Alfa
> Romeo, oddly). The Triumph was almost comical, as it seemed to
understand
> that "late-night-middle-of-nowhere" was the time-place to make this
happen.
>
> Ghosts, me thinks... :lol:
>
> Good luck,
>
> Tom Newell
> San Pedro, California
> --
> Proud Citizen of
> Los Angeles, California
> Founded 1781 as
> El Pueblo de la Reyna de los Angeles, Alta California
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org



Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
Re: [GMCnet] Fw: Re: engine quit, then restarted itself [message #346306 is a reply to message #346303] Sat, 10 August 2019 08:10 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Canada
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
Senior Member
Ron,
You have a '78 so the OEM distributor is HEI. It could be the wires on the distributor pickup coil. The vacuum advance is continuously moving the pickup back and forth so one of the two wires coming from the pick coil could be broken and intermittent from fatigue.

Testing it requires an Ohm-meter and moving the wires back and forth so the intermittent may become permanent so have a replacement pickup on-hand.


Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
Re: [GMCnet] Fw: Re: engine quit, then restarted itself [message #346309 is a reply to message #346306] Sat, 10 August 2019 09:10 Go to previous messageGo to next message
Jp Benson is currently offline  Jp Benson   United States
Messages: 649
Registered: October 2011
Location: Fla
Karma: 2
Senior Member
The module in the distributor can work intermittently if it gets too hot.

JP
Re: [GMCnet] Fw: Re: engine quit, then restarted itself [message #346312 is a reply to message #346303] Sat, 10 August 2019 10:44 Go to previous messageGo to next message
rallymaster is currently offline  rallymaster   United States
Messages: 662
Registered: February 2004
Location: North Plains, ORYGUN
Karma: -4
Senior Member

what colors do i need to match on what, when I replace the pickup coil?

On Sat, 10 Aug 2019 07:10:20 -0600 Bruce Hislop via Gmclist
writes:
> Ron,
> You have a '78 so the OEM distributor is HEI. It could be the wires
> on the distributor pickup coil. The vacuum advance is continuously
> moving the
> pickup back and forth so one of the two wires coming from the pick
> coil could be broken and intermittent from fatigue.
>
> Testing it requires an Ohm-meter and moving the wires back and forth
> so the intermittent may become permanent so have a replacement
> pickup on-hand.
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>


Ron & Linda Clark
North Plains, ORYGUN
1978 Eleganza II


_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org



Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
Re: [GMCnet] Fw: Re: engine quit, then restarted itself [message #346327 is a reply to message #346303] Sun, 11 August 2019 10:39 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Canada
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
Senior Member
Ron,
This PDF on the GMC ignition system explains the coil and pickup wire colour matching on page 10. Hope its correct.

https://www.gmcmi.com/wp-content/uploads/2015/06/Ignition-System_simmons_lamey.pdf


Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
Re: [GMCnet] Fw: Re: engine quit, then restarted itself [message #346331 is a reply to message #346327] Sun, 11 August 2019 13:07 Go to previous message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
It is. Red and yellow on the wires of both coils.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Previous Topic: Fuel tank selector valve
Next Topic: [GMCnet] Want to find a set of Alcoa Wheels (or comparable)
Goto Forum:
  


Current Time: Thu Sep 19 10:45:10 CDT 2024

Total time taken to generate the page: 0.00626 seconds