Dead coach update

[steve southworth]

I still was having trouble. Appeared to be timing. After consulting MattC a few times and futzing with various settings it was running. Strange
setup however. 12degrees initial timing at 600rpm, no vac advance. Am i happy with it? No. But it will get me to the next stop. With vac advance
connected there is exhaust backfire.

Do I know or understand what is going on here? No.
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

 

[emerystora]

12 deg May be a little too much. With vacuum advance connected you are over 12 deg. Try setting vacuum advance a little lower. Try 8deg and then hook up the vacuum and see if it still backfires.

Emery Stora
77 Kingsley
Frederick, CO

>
> I still was having trouble. Appeared to be timing. After consulting MattC a few times and futzing with various settings it was running. Strange
> setup however. 12degrees initial timing at 600rpm, no vac advance. Am i happy with it? No. But it will get me to the next stop. With vac advance
> connected there is exhaust backfire.
>
> Do I know or understand what is going on here? No.
> --
> Steve Southworth
> 1974 Glacier TZE064V100150 (for workin on)
> 1975 Transmode TZE365V100394 (parts & spares)
> Palmyra WI
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[jim kanomata1]

On Sun, Oct 20, 2019 at 6:24 PM Emery Stora via Gmclist <

> 12 deg May be a little too much. With vacuum advance connected you are
> over 12 deg. Try setting vacuum advance a little lower. Try 8deg and then
> hook up the vacuum and see if it still backfires.
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
>
> > On Oct 20, 2019, at 7:03 PM, Steve Southworth via Gmclist <

> >
> > I still was having trouble. Appeared to be timing. After consulting
> MattC a few times and futzing with various settings it was running. Strange
> > setup however. 12degrees initial timing at 600rpm, no vac advance. Am
> i happy with it? No. But it will get me to the next stop. With vac
> advance
> > connected there is exhaust backfire.
> >
> > Do I know or understand what is going on here? No.
> > --
> > Steve Southworth
> > 1974 Glacier TZE064V100150 (for workin on)
> > 1975 Transmode TZE365V100394 (parts & spares)
> > Palmyra WI
> >
> > _______________________________________________
> > 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
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[jim kanomata1]

I think you went to Manifold Vac. , your to go to Throttle Vac.
If you need it explained, call me.

>
>
> On Sun, Oct 20, 2019 at 6:24 PM Emery Stora via Gmclist <

>
>> 12 deg May be a little too much. With vacuum advance connected you are
>> over 12 deg. Try setting vacuum advance a little lower. Try 8deg and then
>> hook up the vacuum and see if it still backfires.
>>
>> Emery Stora
>> 77 Kingsley
>> Frederick, CO
>>
>> > On Oct 20, 2019, at 7:03 PM, Steve Southworth via Gmclist <

>> >
>> > I still was having trouble. Appeared to be timing. After consulting
>> MattC a few times and futzing with various settings it was running. Strange
>> > setup however. 12degrees initial timing at 600rpm, no vac advance. Am
>> i happy with it? No. But it will get me to the next stop. With vac
>> advance
>> > connected there is exhaust backfire.
>> >
>> > Do I know or understand what is going on here? No.
>> > --
>> > Steve Southworth
>> > 1974 Glacier TZE064V100150 (for workin on)
>> > 1975 Transmode TZE365V100394 (parts & spares)
>> > Palmyra WI
>> >
>> > _______________________________________________
>> > 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
>>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk
> http://www.appliedgmc.com
> 1-800-752-7502
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[Ken B]

JIM,

He is going to be stopping by here tomorrow. That is is one of things we will be checking. Also will check for a slipped harmonic balance outer ring
and several other things.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

 

[LQQKatJon]

I personally think you might now be dealing with two things. spark and fuel.

my guess would be you now have spark, but your carb is not giving enough fuel (lean out backfire). your timing setting is not far enough off to
cause the backfiring the way you are describing it. Ken should be able to help you pretty well, He has has performed miracles on some GMC's.
I would be apt to get a boat tank out and try to feed it some unrestricted good fuel.

your carb is wrong, but if it was working prior, it should work well enough now. talk to your friend Ray, he will probably convince you to
install a Holley sniper once you get home.

--
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/