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Engine trouble

JD
Jim D.
Fri, Sep 10, 2021 10:38 PM

Hello gentlemen,
Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two backfires
and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank engine over
again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice sheriff had the
rig on truck and towing it back home before I had a chance to mess around with it anymore.  Any chance it would be fuel? Working with remanded S&J
engine. No upgrades or anything.

Jim DeMellia and Jen Radefeld and our cat Ickis
NH natives
1975 GMC “Palm Beach” ,455, her names Linda
Full time RVers exploring the beautiful and unusual parts of the country.

Hello gentlemen, Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two backfires and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank engine over again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice sheriff had the rig on truck and towing it back home before I had a chance to mess around with it anymore. Any chance it would be fuel? Working with remanded S&J engine. No upgrades or anything. -- Jim DeMellia and Jen Radefeld and our cat Ickis NH natives 1975 GMC “Palm Beach” ,455, her names Linda Full time RVers exploring the beautiful and unusual parts of the country.
RH
Randy Hecht
Fri, Sep 10, 2021 10:47 PM

Maybe clogged fuel filter

Randy Hecht
Roswell, GA

1974 Canyon Lands GMC Motor-coach

On Sep 10, 2021, at 17:38, Jim D. J.Bonez.Designs@gmail.com wrote:

Hello gentlemen,
Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two backfires
and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank engine over
again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice sheriff had the
rig on truck and towing it back home before I had a chance to mess around with it anymore.  Any chance it would be fuel? Working with remanded S&J
engine. No upgrades or anything.

Jim DeMellia and Jen Radefeld and our cat Ickis
NH natives
1975 GMC “Palm Beach” ,455, her names Linda
Full time RVers exploring the beautiful and unusual parts of the country.


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Maybe clogged fuel filter Randy Hecht Roswell, GA 1974 Canyon Lands GMC Motor-coach > On Sep 10, 2021, at 17:38, Jim D. <J.Bonez.Designs@gmail.com> wrote: > > Hello gentlemen, > Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two backfires > and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank engine over > again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice sheriff had the > rig on truck and towing it back home before I had a chance to mess around with it anymore. Any chance it would be fuel? Working with remanded S&J > engine. No upgrades or anything. > -- > Jim DeMellia and Jen Radefeld and our cat Ickis > NH natives > 1975 GMC “Palm Beach” ,455, her names Linda > Full time RVers exploring the beautiful and unusual parts of the country. > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options:
MC
Matt Colie
Fri, Sep 10, 2021 11:06 PM

Jimmy_Bonez wrote on Fri, 10 September 2021 18:38

Hello gentlemen,
Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two
backfires and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank
engine over again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice
sheriff had the rig on truck and towing it back home before I had a chance to mess around with it anymore.  Any chance it would be fuel? Working
with remanded S&J engine. No upgrades or anything.

Jimmy,

Many of us have been there.
As it is a 75 and hence HEI, that would be my first checks, but you say you had spark.
Unfortunately, with HEI, it can recover in the time it takes you to get to the engine room.  (BTDT, but not my coach)
So, in the morning run the whole diagnostic and if you still have questions, we are here to help.

Sudden shutdowns are common on HEI failures.  This is why I suggest that all carry the complete kit.  It is not difficult to install, but I have seen
every single part fail (module, pick-up and coil)  These are not big or expensive parts and do not require special tools.

Sudden shutdowns can happen with fuel system failures, but they are not common.  They are usually proceeded by a succinct loss of power.  You did not
mention that.  So, in the morning go out and pop the air filter and stroke the throttle and see if the accelerator pump spits fuel.

With a recent rebuild, it doesn't sound bad.

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

Jimmy_Bonez wrote on Fri, 10 September 2021 18:38 > Hello gentlemen, > Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two > backfires and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank > engine over again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice > sheriff had the rig on truck and towing it back home before I had a chance to mess around with it anymore. Any chance it would be fuel? Working > with remanded S&J engine. No upgrades or anything. Jimmy, Many of us have been there. As it is a 75 and hence HEI, that would be my first checks, but you say you had spark. Unfortunately, with HEI, it can recover in the time it takes you to get to the engine room. (BTDT, but not my coach) So, in the morning run the whole diagnostic and if you still have questions, we are here to help. Sudden shutdowns are common on HEI failures. This is why I suggest that all carry the complete kit. It is not difficult to install, but I have seen every single part fail (module, pick-up and coil) These are not big or expensive parts and do not require special tools. Sudden shutdowns can happen with fuel system failures, but they are not common. They are usually proceeded by a succinct loss of power. You did not mention that. So, in the morning go out and pop the air filter and stroke the throttle and see if the accelerator pump spits fuel. With a recent rebuild, it doesn't sound bad. 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
JD
Jim DeMellia
Sat, Sep 11, 2021 12:38 AM

Thanks for the responses. Small update. Noticed fuel leaking to the back of the coach when it was on the hook. Can’t find the leak yet while it’s sitting on level ground.

Sent from my iPhone

On Sep 10, 2021, at 7:07 PM, Matt Colie matt7323tze@gmail.com wrote:

Jimmy_Bonez wrote on Fri, 10 September 2021 18:38

Hello gentlemen,
Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two
backfires and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank
engine over again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice
sheriff had the rig on truck and towing it back home before I had a chance to mess around with it anymore.  Any chance it would be fuel? Working
with remanded S&J engine. No upgrades or anything.

Jimmy,

Many of us have been there.
As it is a 75 and hence HEI, that would be my first checks, but you say you had spark.
Unfortunately, with HEI, it can recover in the time it takes you to get to the engine room.  (BTDT, but not my coach)
So, in the morning run the whole diagnostic and if you still have questions, we are here to help.

Sudden shutdowns are common on HEI failures.  This is why I suggest that all carry the complete kit.  It is not difficult to install, but I have seen
every single part fail (module, pick-up and coil)  These are not big or expensive parts and do not require special tools.

Sudden shutdowns can happen with fuel system failures, but they are not common.  They are usually proceeded by a succinct loss of power.  You did not
mention that.  So, in the morning go out and pop the air filter and stroke the throttle and see if the accelerator pump spits fuel.

With a recent rebuild, it doesn't sound bad.

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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Thanks for the responses. Small update. Noticed fuel leaking to the back of the coach when it was on the hook. Can’t find the leak yet while it’s sitting on level ground. Sent from my iPhone > On Sep 10, 2021, at 7:07 PM, Matt Colie <matt7323tze@gmail.com> wrote: > > Jimmy_Bonez wrote on Fri, 10 September 2021 18:38 >> Hello gentlemen, >> Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two >> backfires and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank >> engine over again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice >> sheriff had the rig on truck and towing it back home before I had a chance to mess around with it anymore. Any chance it would be fuel? Working >> with remanded S&J engine. No upgrades or anything. > > Jimmy, > > Many of us have been there. > As it is a 75 and hence HEI, that would be my first checks, but you say you had spark. > Unfortunately, with HEI, it can recover in the time it takes you to get to the engine room. (BTDT, but not my coach) > So, in the morning run the whole diagnostic and if you still have questions, we are here to help. > > Sudden shutdowns are common on HEI failures. This is why I suggest that all carry the complete kit. It is not difficult to install, but I have seen > every single part fail (module, pick-up and coil) These are not big or expensive parts and do not require special tools. > > Sudden shutdowns can happen with fuel system failures, but they are not common. They are usually proceeded by a succinct loss of power. You did not > mention that. So, in the morning go out and pop the air filter and stroke the throttle and see if the accelerator pump spits fuel. > > With a recent rebuild, it doesn't sound bad. > > 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 > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options:
RH
Randy Hecht
Sat, Sep 11, 2021 2:07 AM

Look at hose and clamps

Randy Hecht
Roswell, GA

1974 Canyon Lands GMC Motor-coach

On Sep 10, 2021, at 19:38, Jim DeMellia j.bonez.designs@gmail.com wrote:

Thanks for the responses. Small update. Noticed fuel leaking to the back of the coach when it was on the hook. Can’t find the leak yet while it’s sitting on level ground.

Sent from my iPhone

On Sep 10, 2021, at 7:07 PM, Matt Colie matt7323tze@gmail.com wrote:

Jimmy_Bonez wrote on Fri, 10 September 2021 18:38

Hello gentlemen,
Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two
backfires and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank
engine over again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice
sheriff had the rig on truck and towing it back home before I had a chance to mess around with it anymore.  Any chance it would be fuel? Working
with remanded S&J engine. No upgrades or anything.

Jimmy,

Many of us have been there.
As it is a 75 and hence HEI, that would be my first checks, but you say you had spark.
Unfortunately, with HEI, it can recover in the time it takes you to get to the engine room.  (BTDT, but not my coach)
So, in the morning run the whole diagnostic and if you still have questions, we are here to help.

Sudden shutdowns are common on HEI failures.  This is why I suggest that all carry the complete kit.  It is not difficult to install, but I have seen
every single part fail (module, pick-up and coil)  These are not big or expensive parts and do not require special tools.

Sudden shutdowns can happen with fuel system failures, but they are not common.  They are usually proceeded by a succinct loss of power.  You did not
mention that.  So, in the morning go out and pop the air filter and stroke the throttle and see if the accelerator pump spits fuel.

With a recent rebuild, it doesn't sound bad.

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


GMCnet mailing list
Unsubscribe or Change List Options:


GMCnet mailing list
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Look at hose and clamps Randy Hecht Roswell, GA 1974 Canyon Lands GMC Motor-coach > On Sep 10, 2021, at 19:38, Jim DeMellia <j.bonez.designs@gmail.com> wrote: > > Thanks for the responses. Small update. Noticed fuel leaking to the back of the coach when it was on the hook. Can’t find the leak yet while it’s sitting on level ground. > > Sent from my iPhone > >> On Sep 10, 2021, at 7:07 PM, Matt Colie <matt7323tze@gmail.com> wrote: >> >> Jimmy_Bonez wrote on Fri, 10 September 2021 18:38 >>> Hello gentlemen, >>> Need a little trouble shooting. Camper broke down today on the way to our last trip of the season. Driving fine then all of sudden two >>> backfires and engine shut down. Coasted to a stop on the side of the road. Had minimal tools to diagnose anything. After pulling over tried to crank >>> engine over again and nothing. Did check for spark which we had. Didn’t get a chance to check if we were getting fuel. Pregnant wife and a nice >>> sheriff had the rig on truck and towing it back home before I had a chance to mess around with it anymore. Any chance it would be fuel? Working >>> with remanded S&J engine. No upgrades or anything. >> >> Jimmy, >> >> Many of us have been there. >> As it is a 75 and hence HEI, that would be my first checks, but you say you had spark. >> Unfortunately, with HEI, it can recover in the time it takes you to get to the engine room. (BTDT, but not my coach) >> So, in the morning run the whole diagnostic and if you still have questions, we are here to help. >> >> Sudden shutdowns are common on HEI failures. This is why I suggest that all carry the complete kit. It is not difficult to install, but I have seen >> every single part fail (module, pick-up and coil) These are not big or expensive parts and do not require special tools. >> >> Sudden shutdowns can happen with fuel system failures, but they are not common. They are usually proceeded by a succinct loss of power. You did not >> mention that. So, in the morning go out and pop the air filter and stroke the throttle and see if the accelerator pump spits fuel. >> >> With a recent rebuild, it doesn't sound bad. >> >> 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 >> _______________________________________________ >> GMCnet mailing list >> Unsubscribe or Change List Options: > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options:
JK
Jim Kanomata
Sat, Sep 11, 2021 3:25 AM

l leak is possibly from the fuel level sensor on top of the tank .
That should have nothing to do with the engine issue.
If your going to replace the coil or module, replace both as One can ruin
the other .

On Fri, Sep 10, 2021 at 7:07 PM Randy Hecht hechtr@charter.net wrote:

Look at hose and clamps

Randy Hecht
Roswell, GA

1974 Canyon Lands GMC Motor-coach

On Sep 10, 2021, at 19:38, Jim DeMellia j.bonez.designs@gmail.com

wrote:

Thanks for the responses. Small update. Noticed fuel leaking to the

back of the coach when it was on the hook. Can’t find the leak yet while
it’s sitting on level ground.

Sent from my iPhone

On Sep 10, 2021, at 7:07 PM, Matt Colie matt7323tze@gmail.com wrote:

Jimmy_Bonez wrote on Fri, 10 September 2021 18:38

Hello gentlemen,
Need a little trouble shooting. Camper broke down today on the way

to our last trip of the season. Driving fine then all of sudden two

backfires and engine shut down. Coasted to a stop on the side of the

road. Had minimal tools to diagnose anything. After pulling over tried to
crank

engine over again and nothing. Did check for spark which we had.

Didn’t get a chance to check if we were getting fuel. Pregnant wife and a
nice

sheriff had the rig on truck and towing it back home before I had a

chance to mess around with it anymore.  Any chance it would be fuel? Working

with remanded S&J engine. No upgrades or anything.

Jimmy,

Many of us have been there.
As it is a 75 and hence HEI, that would be my first checks, but you say

you had spark.

Unfortunately, with HEI, it can recover in the time it takes you to get

to the engine room.  (BTDT, but not my coach)

So, in the morning run the whole diagnostic and if you still have

questions, we are here to help.

Sudden shutdowns are common on HEI failures.  This is why I suggest

that all carry the complete kit.  It is not difficult to install, but I
have seen

every single part fail (module, pick-up and coil)  These are not big or

expensive parts and do not require special tools.

Sudden shutdowns can happen with fuel system failures, but they are not

common.  They are usually proceeded by a succinct loss of power.  You did
not

mention that.  So, in the morning go out and pop the air filter and

stroke the throttle and see if the accelerator pump spits fuel.

With a recent rebuild, it doesn't sound bad.

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


GMCnet mailing list
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--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502

l leak is possibly from the fuel level sensor on top of the tank . That should have nothing to do with the engine issue. If your going to replace the coil or module, replace both as One can ruin the other . On Fri, Sep 10, 2021 at 7:07 PM Randy Hecht <hechtr@charter.net> wrote: > Look at hose and clamps > > Randy Hecht > Roswell, GA > > 1974 Canyon Lands GMC Motor-coach > > > > On Sep 10, 2021, at 19:38, Jim DeMellia <j.bonez.designs@gmail.com> > wrote: > > > > Thanks for the responses. Small update. Noticed fuel leaking to the > back of the coach when it was on the hook. Can’t find the leak yet while > it’s sitting on level ground. > > > > Sent from my iPhone > > > >> On Sep 10, 2021, at 7:07 PM, Matt Colie <matt7323tze@gmail.com> wrote: > >> > >> Jimmy_Bonez wrote on Fri, 10 September 2021 18:38 > >>> Hello gentlemen, > >>> Need a little trouble shooting. Camper broke down today on the way > to our last trip of the season. Driving fine then all of sudden two > >>> backfires and engine shut down. Coasted to a stop on the side of the > road. Had minimal tools to diagnose anything. After pulling over tried to > crank > >>> engine over again and nothing. Did check for spark which we had. > Didn’t get a chance to check if we were getting fuel. Pregnant wife and a > nice > >>> sheriff had the rig on truck and towing it back home before I had a > chance to mess around with it anymore. Any chance it would be fuel? Working > >>> with remanded S&J engine. No upgrades or anything. > >> > >> Jimmy, > >> > >> Many of us have been there. > >> As it is a 75 and hence HEI, that would be my first checks, but you say > you had spark. > >> Unfortunately, with HEI, it can recover in the time it takes you to get > to the engine room. (BTDT, but not my coach) > >> So, in the morning run the whole diagnostic and if you still have > questions, we are here to help. > >> > >> Sudden shutdowns are common on HEI failures. This is why I suggest > that all carry the complete kit. It is not difficult to install, but I > have seen > >> every single part fail (module, pick-up and coil) These are not big or > expensive parts and do not require special tools. > >> > >> Sudden shutdowns can happen with fuel system failures, but they are not > common. They are usually proceeded by a succinct loss of power. You did > not > >> mention that. So, in the morning go out and pop the air filter and > stroke the throttle and see if the accelerator pump spits fuel. > >> > >> With a recent rebuild, it doesn't sound bad. > >> > >> 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 > >> _______________________________________________ > >> GMCnet mailing list > >> Unsubscribe or Change List Options: > > _______________________________________________ > > GMCnet mailing list > > Unsubscribe or Change List Options: > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: > -- Jim Kanomata ASE Applied/GMC, Newark,CA jimk@appliedairfilters.com http://www.gmcrvparts.com 1-800-752-7502
KB
Ken Burton
Sat, Sep 11, 2021 6:29 AM

There are probably 10 things we could guess at.  So with an instant stop without any missing or reduced power before that, I am going to guess it is
electrical and probably ignition failure.  Maybe the module.  I can think if a lot of mechanical problems too.  If you think it is fuel.  Take off
the air cleaner lid and look down the throat of the carb while you step on the gas a couple of times.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

There are probably 10 things we could guess at. So with an instant stop without any missing or reduced power before that, I am going to guess it is electrical and probably ignition failure. Maybe the module. I can think if a lot of mechanical problems too. If you think it is fuel. Take off the air cleaner lid and look down the throat of the carb while you step on the gas a couple of times. -- Ken Burton - N9KB 76 Palm Beach Hebron, Indiana