Home » Public Forums » GMCnet » [GMCnet] HEI tip from Dick Paterson Springfield Ignition
| [GMCnet] HEI tip from Dick Paterson Springfield Ignition [message #343525] |
Mon, 20 May 2019 17:50  |
Gary Worobec
Messages: 867
Registered: May 2005
Karma: -1
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Senior Member |
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Hi, might be interesting for those of you with HEI ignition.
Read from bottom up.
Thanks
Gary
> On May 20, 2019, at 2:40 PM, Dick Paterson wrote:
>
> Good on you Gary --
> -if the hold down screw over the ground strap works loose it will create the arc burn you see. On our oval track distributors we touch the 2 front coil screws with JB Weld to prevent them from vibrating loose. Regards dick
>
> -----Original Message-----
> From: Gary Worobec [mailto:garytwmw@gmail.com ]
> Sent: May 20, 2019 5:16 PM
> To: Dick Paterson
> Subject: Re: HEI issue
>
> Replaced the HEI coil and it fired right up. I am going to change out the alternator and then get the old one tested and if OK use it as a spare. On the little ground strap inside the cap it looked like something had been arcing.
>
> Thanks for the help
>
> Gary
>
>> On May 16, 2019, at 7:36 PM, Dick Paterson wrote:
>>
>> Hi Gary -repeated -module failure is usually caused by a damaged coil-- the coil gets whacked with a voltage spike and shorts internally --once the shunt has burned into the internal coils wiring -it will shaort to ground . Every time it shorts it triggers the module ----now instead of its regular cycling it soars ,and gives up-
>> Sources for voltage spikes come from a bad diode in the alternators 6 diodes. Or from a battery charger on "start" setting putting out serious amps.
>> First I would have the alternator checked out at a shop . then I would change the coil
>> You can source the coil and module from your local parts store ---ask for a 75 or 76 chev camaro Z 28 --or corvette --or police HD for a 350 chev.
>>
>> When you put the cap back on --- be sure the 3 wire black plug is pushed up into the cap "solid" ---you should not see any brass terminal ends sticking out the bottom of the black plug. Regards dick
>>
>>
>>
>>
>> -----Original Message-----
>> From: Gary Worobec [mailto:garytwmw@gmail.com ]
>> Sent: May 16, 2019 9:49 PM
>> To: dick@paterson-gmc.com
>> Subject: HEI issue
>>
>> Hi Dick, bought an HEI distributor from you about ten years ago for my 73 GMC (455 with Howell EFI with the EBL). All ran great for 20000 miles. Last year it would not start. Changed the module and away we went. Yesterday we took the coach out for a run and after about 7 miles it just shut off. I had a new spare module and replaced it and still would not start. Lots of gas but no spark. Could it be the HEI coil in the distributor cap or possibly the pickup coil. Any thoughts. Can I source both those items locally or are they specific to your red HEI distibutor.
>>
>> Any help welcomed. I’ll give you a call about 10:00 am or so your time.
>>
>> Thanks
>>
>> Gary Worobec
>> Anza, CA, 92539
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| Re: [GMCnet] HEI tip from Dick Paterson Springfield Ignition [message #343539 is a reply to message #343525] |
Tue, 21 May 2019 10:54  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Gary,
For my personal coach, I have my guys install DELCO ignition parts only.
For our shop we use the higher priced parts as they are reliable. There are
two grades on ignition parts from what our part man Gary tell me.
On Mon, May 20, 2019 at 3:51 PM Gary Worobec via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Hi, might be interesting for those of you with HEI ignition.
>
> Read from bottom up.
>
> Thanks
>
> Gary
>
>
>> On May 20, 2019, at 2:40 PM, Dick Paterson > wrote:
>>
>> Good on you Gary --
>> -if the hold down screw over the ground strap works loose it will
> create the arc burn you see. On our oval track distributors we touch the
> 2 front coil screws with JB Weld to prevent them from vibrating loose.
> Regards dick
>>
>> -----Original Message-----
>> From: Gary Worobec [mailto:garytwmw@gmail.com ]
>
>> Sent: May 20, 2019 5:16 PM
>> To: Dick Paterson
>> Subject: Re: HEI issue
>>
>> Replaced the HEI coil and it fired right up. I am going to change out
> the alternator and then get the old one tested and if OK use it as a spare.
> On the little ground strap inside the cap it looked like something had been
> arcing.
>>
>> Thanks for the help
>>
>> Gary
>>
>>> On May 16, 2019, at 7:36 PM, Dick Paterson > wrote:
>>>
>>> Hi Gary -repeated -module failure is usually caused by a damaged
> coil-- the coil gets whacked with a voltage spike and shorts internally
> --once the shunt has burned into the internal coils wiring -it will
> shaort to ground . Every time it shorts it triggers the module ----now
> instead of its regular cycling it soars ,and gives up-
>>> Sources for voltage spikes come from a bad diode in the alternators 6
> diodes. Or from a battery charger on "start" setting putting out
> serious amps.
>>> First I would have the alternator checked out at a shop . then I
> would change the coil
>>> You can source the coil and module from your local parts store ---ask
> for a 75 or 76 chev camaro Z 28 --or corvette --or police HD for
> a 350 chev.
>>>
>>> When you put the cap back on --- be sure the 3 wire black plug is
> pushed up into the cap "solid" ---you should not see any brass terminal
> ends sticking out the bottom of the black plug. Regards dick
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: Gary Worobec [mailto:garytwmw@gmail.com garytwmw@gmail.com>]
>>> Sent: May 16, 2019 9:49 PM
>>> To: dick@paterson-gmc.com
>>> Subject: HEI issue
>>>
>>> Hi Dick, bought an HEI distributor from you about ten years ago for my
> 73 GMC (455 with Howell EFI with the EBL). All ran great for 20000 miles.
> Last year it would not start. Changed the module and away we went.
> Yesterday we took the coach out for a run and after about 7 miles it just
> shut off. I had a new spare module and replaced it and still would not
> start. Lots of gas but no spark. Could it be the HEI coil in the
> distributor cap or possibly the pickup coil. Any thoughts. Can I source
> both those items locally or are they specific to your red HEI distibutor.
>>>
>>> Any help welcomed. I’ll give you a call about 10:00 am or so your time.
>>>
>>> Thanks
>>>
>>> Gary Worobec
>>> Anza, CA, 92539
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> GMCnet mailing list
> Unsubscribe or Change List Options:
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] HEI tip from Dick Paterson Springfield Ignition [message #343554 is a reply to message #343525] |
Thu, 23 May 2019 10:06 |
JohnS
Messages: 126
Registered: December 2014
Location: Vacaville, CA
Karma: -2
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Senior Member |
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I completely agree with Delco parts, Jim. I have found that some aftermarket coils come with slightly different length screws. If the screws are a little longer they may cause a crack in the cap. The crack may not occur immediately....Some distance down the road you're again diagnosing an ignition problem! JohnS
John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
78 Buskirk stretch, "What were we thinking?"
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| Re: [GMCnet] HEI tip from Dick Paterson Springfield Ignition [message #343574 is a reply to message #343554] |
Thu, 23 May 2019 13:11 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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John,
One time after a new coil, the engine ran like crap.
Took me some time to finger it out.
Anther one is with my Cad engine, I wired it up same as Olds and it back
fired out of both ends and couldn't finger it out till I stopped to think
after 6:00 and realized that I was using the Olds firing order.
Also the numbering on the cylinders is opposite.
On Thu, May 23, 2019 at 8:24 AM John Shutzbaugh via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I completely agree with Delco parts, Jim. I have found that some
> aftermarket coils come with slightly different length screws. If the
> screws are a
> little longer they may cause a crack in the cap. The crack may not occur
> immediately....Some distance down the road you're again diagnosing an
> ignition problem! JohnS
> --
> John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
> 77 Eleganza, bought it new, can't blame PO, and
> 78 Buskirk stretch, "What were we thinking?"
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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