Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

If I can put in my two cents worth, the problem may be related to the
fuel. Ethanol is mandated now, generally 10%, and alcohol will tear up
the rubber in older fuel systems. Some older mechanical fuel pumps use
rubber bellows and valves and they will deteriorate, as will the rubber
bellows in the older accelerator pumps. Connect a fuel pressure gauge in
the line at the carb, should be at least 6PSI. If it is, then change the
filter in the carb, if there is one. Alcohol in the fuel can knock a lot
of crud loose and plug it. I had exactly the same problem in my '61 CJ5
with an Olds V6. The filter in the carb plugged up and stopped me dead.
I rebuilt the carb with alcohol-tolerant parts. I replaced the stock
fuel pump with a Carter and added a Facet electric pump near the fuel
tank. No problems since.

--

Bill Lahr
mr.bill@pcmagic.net



Jamie Mello wrote:
> Yea let us know how it goes.And like mike said I hope it is something
> cheap and easy.
>
>
>
> 99 wrangler TJ 2.5 lift 31 inch Good year MTR tires and a ton of
> lights
> Warn M8000 winch and more toys to come.
>
>
>
> Some people have an addiction to drink...
> Some people have an addiction to drugs....
> I just have an addiction to Jeeps and their accessories....
>
>
>
>
>
>
>
>
>
>
>

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

If I can put in my two cents worth, the problem may be related to the
fuel. Ethanol is mandated now, generally 10%, and alcohol will tear up
the rubber in older fuel systems. Some older mechanical fuel pumps use
rubber bellows and valves and they will deteriorate, as will the rubber
bellows in the older accelerator pumps. Connect a fuel pressure gauge in
the line at the carb, should be at least 6PSI. If it is, then change the
filter in the carb, if there is one. Alcohol in the fuel can knock a lot
of crud loose and plug it. I had exactly the same problem in my '61 CJ5
with an Olds V6. The filter in the carb plugged up and stopped me dead.
I rebuilt the carb with alcohol-tolerant parts. I replaced the stock
fuel pump with a Carter and added a Facet electric pump near the fuel
tank. No problems since.

--

Bill Lahr
mr.bill@pcmagic.net



Jamie Mello wrote:
> Yea let us know how it goes.And like mike said I hope it is something
> cheap and easy.
>
>
>
> 99 wrangler TJ 2.5 lift 31 inch Good year MTR tires and a ton of
> lights
> Warn M8000 winch and more toys to come.
>
>
>
> Some people have an addiction to drink...
> Some people have an addiction to drugs....
> I just have an addiction to Jeeps and their accessories....
>
>
>
>
>
>
>
>
>
>
>

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

If I can put in my two cents worth, the problem may be related to the
fuel. Ethanol is mandated now, generally 10%, and alcohol will tear up
the rubber in older fuel systems. Some older mechanical fuel pumps use
rubber bellows and valves and they will deteriorate, as will the rubber
bellows in the older accelerator pumps. Connect a fuel pressure gauge in
the line at the carb, should be at least 6PSI. If it is, then change the
filter in the carb, if there is one. Alcohol in the fuel can knock a lot
of crud loose and plug it. I had exactly the same problem in my '61 CJ5
with an Olds V6. The filter in the carb plugged up and stopped me dead.
I rebuilt the carb with alcohol-tolerant parts. I replaced the stock
fuel pump with a Carter and added a Facet electric pump near the fuel
tank. No problems since.

--

Bill Lahr
mr.bill@pcmagic.net



Jamie Mello wrote:
> Yea let us know how it goes.And like mike said I hope it is something
> cheap and easy.
>
>
>
> 99 wrangler TJ 2.5 lift 31 inch Good year MTR tires and a ton of
> lights
> Warn M8000 winch and more toys to come.
>
>
>
> Some people have an addiction to drink...
> Some people have an addiction to drugs....
> I just have an addiction to Jeeps and their accessories....
>
>
>
>
>
>
>
>
>
>
>

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

As an update (disclosure: I am extremely new to auto mechanics):
Removing the air filter did not fix the problem unfortunately, so now
I'm checking if it's the fuel filter.

I removed the fuel pickup plate from the gas tank (had to remove the
driver seat) so that I could check the fuel filter element. It was
pretty dirty, not terrible though. I have ordered the correct
replacement and am waiting for it to show up.

While I had the pickup plate removed, I though I'd check out the tank
condition with a flashlight... It was gross in there. The gasket that
seals the pickup to the tank had essentially disintegrated and pieces
of it were floating in the gas along with other junk. I removed and
cleaned the tank and will replace the gasket and filter when they
arrive (soon). I'll also be sure to add some Stabil when I fill it up
again. I'll update again once the filter is replaced.

Here's a picture of the of what an M38A1 pickup plate with filter
attached looks like:

http://www.midwestmil.com/fuelpickupplate.jpg

-Steve

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

As an update (disclosure: I am extremely new to auto mechanics):
Removing the air filter did not fix the problem unfortunately, so now
I'm checking if it's the fuel filter.

I removed the fuel pickup plate from the gas tank (had to remove the
driver seat) so that I could check the fuel filter element. It was
pretty dirty, not terrible though. I have ordered the correct
replacement and am waiting for it to show up.

While I had the pickup plate removed, I though I'd check out the tank
condition with a flashlight... It was gross in there. The gasket that
seals the pickup to the tank had essentially disintegrated and pieces
of it were floating in the gas along with other junk. I removed and
cleaned the tank and will replace the gasket and filter when they
arrive (soon). I'll also be sure to add some Stabil when I fill it up
again. I'll update again once the filter is replaced.

Here's a picture of the of what an M38A1 pickup plate with filter
attached looks like:

http://www.midwestmil.com/fuelpickupplate.jpg

-Steve

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

As an update (disclosure: I am extremely new to auto mechanics):
Removing the air filter did not fix the problem unfortunately, so now
I'm checking if it's the fuel filter.

I removed the fuel pickup plate from the gas tank (had to remove the
driver seat) so that I could check the fuel filter element. It was
pretty dirty, not terrible though. I have ordered the correct
replacement and am waiting for it to show up.

While I had the pickup plate removed, I though I'd check out the tank
condition with a flashlight... It was gross in there. The gasket that
seals the pickup to the tank had essentially disintegrated and pieces
of it were floating in the gas along with other junk. I removed and
cleaned the tank and will replace the gasket and filter when they
arrive (soon). I'll also be sure to add some Stabil when I fill it up
again. I'll update again once the filter is replaced.

Here's a picture of the of what an M38A1 pickup plate with filter
attached looks like:

http://www.midwestmil.com/fuelpickupplate.jpg

-Steve

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

As an update (disclosure: I am extremely new to auto mechanics):
Removing the air filter did not fix the problem unfortunately, so now
I'm checking if it's the fuel filter.

I removed the fuel pickup plate from the gas tank (had to remove the
driver seat) so that I could check the fuel filter element. It was
pretty dirty, not terrible though. I have ordered the correct
replacement and am waiting for it to show up.

While I had the pickup plate removed, I though I'd check out the tank
condition with a flashlight... It was gross in there. The gasket that
seals the pickup to the tank had essentially disintegrated and pieces
of it were floating in the gas along with other junk. I removed and
cleaned the tank and will replace the gasket and filter when they
arrive (soon). I'll also be sure to add some Stabil when I fill it up
again. I'll update again once the filter is replaced.

Here's a picture of the of what an M38A1 pickup plate with filter
attached looks like:

http://www.midwestmil.com/fuelpickupplate.jpg

-Steve

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

steve.newhouse wrote:

> As an update (disclosure: I am extremely new to auto mechanics):
> Removing the air filter did not fix the problem unfortunately, so now
> I'm checking if it's the fuel filter.
>
> I removed the fuel pickup plate from the gas tank (had to remove the
> driver seat) so that I could check the fuel filter element. It was
> pretty dirty, not terrible though. I have ordered the correct
> replacement and am waiting for it to show up.
>
> While I had the pickup plate removed, I though I'd check out the tank
> condition with a flashlight... It was gross in there. The gasket that
> seals the pickup to the tank had essentially disintegrated and pieces
> of it were floating in the gas along with other junk. I removed and
> cleaned the tank and will replace the gasket and filter when they
> arrive (soon). I'll also be sure to add some Stabil when I fill it up
> again. I'll update again once the filter is replaced.
>
> Here's a picture of the of what an M38A1 pickup plate with filter
> attached looks like:
>
> http://www.midwestmil.com/fuelpickupplate.jpg
>
> -Steve
>


How did you clean that tank? It will probably need more than just a
rinse. Instead of Stabil, you might run a bit of Seafoam in there to
clean up any varnish in the lines, etc.

tw

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

steve.newhouse wrote:

> As an update (disclosure: I am extremely new to auto mechanics):
> Removing the air filter did not fix the problem unfortunately, so now
> I'm checking if it's the fuel filter.
>
> I removed the fuel pickup plate from the gas tank (had to remove the
> driver seat) so that I could check the fuel filter element. It was
> pretty dirty, not terrible though. I have ordered the correct
> replacement and am waiting for it to show up.
>
> While I had the pickup plate removed, I though I'd check out the tank
> condition with a flashlight... It was gross in there. The gasket that
> seals the pickup to the tank had essentially disintegrated and pieces
> of it were floating in the gas along with other junk. I removed and
> cleaned the tank and will replace the gasket and filter when they
> arrive (soon). I'll also be sure to add some Stabil when I fill it up
> again. I'll update again once the filter is replaced.
>
> Here's a picture of the of what an M38A1 pickup plate with filter
> attached looks like:
>
> http://www.midwestmil.com/fuelpickupplate.jpg
>
> -Steve
>


How did you clean that tank? It will probably need more than just a
rinse. Instead of Stabil, you might run a bit of Seafoam in there to
clean up any varnish in the lines, etc.

tw

Re: M38A1 -- Idle's OK, Stalls on Acceleration
 

steve.newhouse wrote:

> As an update (disclosure: I am extremely new to auto mechanics):
> Removing the air filter did not fix the problem unfortunately, so now
> I'm checking if it's the fuel filter.
>
> I removed the fuel pickup plate from the gas tank (had to remove the
> driver seat) so that I could check the fuel filter element. It was
> pretty dirty, not terrible though. I have ordered the correct
> replacement and am waiting for it to show up.
>
> While I had the pickup plate removed, I though I'd check out the tank
> condition with a flashlight... It was gross in there. The gasket that
> seals the pickup to the tank had essentially disintegrated and pieces
> of it were floating in the gas along with other junk. I removed and
> cleaned the tank and will replace the gasket and filter when they
> arrive (soon). I'll also be sure to add some Stabil when I fill it up
> again. I'll update again once the filter is replaced.
>
> Here's a picture of the of what an M38A1 pickup plate with filter
> attached looks like:
>
> http://www.midwestmil.com/fuelpickupplate.jpg
>
> -Steve
>


How did you clean that tank? It will probably need more than just a
rinse. Instead of Stabil, you might run a bit of Seafoam in there to
clean up any varnish in the lines, etc.

tw