carb problems

Hello, Ok In a nutshell i have a fairly high performance 383 stroker
(505 HP) and this winter i pulled apart te motor and replaced all of
the gaskets, I only drive it about 500 miles per year and have not
really had to fix anything for the last 10 years. I put it back
together and went for a test drive, the truck started sputtering and
the stalled. I got it in the garage luckily and from that point foward
it would not start, When I crank it over the carb (then a holley 750)
started shoting fuel out of the overflow vents, I adjusted what I
could and replaced the needles. This didnt fix the problem, I then
changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
before. Still not the problem. I the replaced the carb with a new
deamon 750 cfm and was sure that this was the problem but to my
suprise on the first crank fuel came out the overflow tubes. So now im
compleatly lost as to why im having this problem, Is there something
im forgetting, or something ive may have screwed up putting the motor
back together.Im truley at a loss right now and dont want to burn my
house down, I shuld add that the fuel comes out of the overflow tubes
about 3 inches high when i try and crank it over. Thanks, chris

On Feb 17, 11:32 am, "59Fleetside" > wrote:
> Hello, Ok In a nutshell i have a fairly high performance 383 stroker
> (505 HP) and this winter i pulled apart te motor and replaced all of
> the gaskets, I only drive it about 500 miles per year and have not
> really had to fix anything for the last 10 years. I put it back
> together and went for a test drive, the truck started sputtering and
> the stalled. I got it in the garage luckily and from that point foward
> it would not start, When I crank it over the carb (then a holley 750)
> started shoting fuel out of the overflow vents, I adjusted what I
> could and replaced the needles. This didnt fix the problem, I then
> changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
> before. Still not the problem. I the replaced the carb with a new
> deamon 750 cfm and was sure that this was the problem but to my
> suprise on the first crank fuel came out the overflow tubes. So now im
> compleatly lost as to why im having this problem, Is there something
> im forgetting, or something ive may have screwed up putting the motor
> back together.Im truley at a loss right now and dont want to burn my
> house down, I shuld add that the fuel comes out of the overflow tubes
> about 3 inches high when i try and crank it over. Thanks, chris

I'm no carb expert, but if it happened with two units, the likelyhood
that it is a carb issue seems very low. Is it possible that engine
valve timing is off in such a way that there is excessive pressure in
the intake (verses the normal negative pressure pulsations that occur
when valves open/close at the correct time)?

Does your fuel pump have a return fuel line to the tank that became
pinched/crimped during engine installation? Too much fuel pressure
could blow your needle off of it's seat.

Toyota MDT in MO

59Fleetside wrote:
>
> Hello, Ok In a nutshell i have a fairly high performance 383 stroker
> (505 HP) and this winter i pulled apart te motor and replaced all of
> the gaskets, I only drive it about 500 miles per year and have not
> really had to fix anything for the last 10 years. I put it back
> together and went for a test drive, the truck started sputtering and
> the stalled. I got it in the garage luckily and from that point foward
> it would not start, When I crank it over the carb (then a holley 750)
> started shoting fuel out of the overflow vents, I adjusted what I
> could and replaced the needles. This didnt fix the problem, I then
> changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
> before. Still not the problem. I the replaced the carb with a new
> deamon 750 cfm and was sure that this was the problem but to my
> suprise on the first crank fuel came out the overflow tubes. So now im
> compleatly lost as to why im having this problem, Is there something
> im forgetting, or something ive may have screwed up putting the motor
> back together.Im truley at a loss right now and dont want to burn my
> house down, I shuld add that the fuel comes out of the overflow tubes
> about 3 inches high when i try and crank it over. Thanks, chris


The overflowing carb is due to a malfunction float valve which is what
keeps the fuel at a constant level. The float is either stuck or there
is dirt or damage causing the needle to not seat properly and form a
seal. Dirt in the gas lines seems like a likely cause if it is happening
to 2 different carbs. But it could be gummed up float in both if both
carbs were left to sit a very long time with gas in them.

-jim

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On 17 Feb 2007 09:32:02 -0800, "59Fleetside" >
wrote:

>Hello, Ok In a nutshell i have a fairly high performance 383 stroker
>(505 HP) and this winter i pulled apart te motor and replaced all of
>the gaskets, I only drive it about 500 miles per year

That's why there's crap in your fuel. You could have rubber hoses
deteriorating, metal lines rusting, whatever. You need to install an
inline filter right at the car inlet. The problem is grit getting
stuck between the needle(s) and seat(s) preventing the needle and seat
valve(s) from closing.

Bet my shop on it.

Don
www.donsautomotive.com

> and have not
>really had to fix anything for the last 10 years. I put it back
>together and went for a test drive, the truck started sputtering and
>the stalled. I got it in the garage luckily and from that point foward
>it would not start, When I crank it over the carb (then a holley 750)
>started shoting fuel out of the overflow vents, I adjusted what I
>could and replaced the needles. This didnt fix the problem, I then
>changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
>before. Still not the problem. I the replaced the carb with a new
>deamon 750 cfm and was sure that this was the problem but to my
>suprise on the first crank fuel came out the overflow tubes. So now im
>compleatly lost as to why im having this problem, Is there something
>im forgetting, or something ive may have screwed up putting the motor
>back together.Im truley at a loss right now and dont want to burn my
>house down, I shuld add that the fuel comes out of the overflow tubes
>about 3 inches high when i try and crank it over. Thanks, chris

On Feb 17, 6:19 pm, Don > wrote:
> On 17 Feb 2007 09:32:02 -0800, "59Fleetside" >
> wrote:
>
> >Hello, Ok In a nutshell i have a fairly high performance 383 stroker
> >(505 HP) and this winter i pulled apart te motor and replaced all of
> >the gaskets, I only drive it about 500 miles per year
>
> That's why there's crap in your fuel. You could have rubber hoses
> deteriorating, metal lines rusting, whatever. You need to install an
> inline filter right at the car inlet. The problem is grit getting
> stuck between the needle(s) and seat(s) preventing the needle and seat
> valve(s) from closing.
>
> Bet my shop on it.
>
> Donwww.donsautomotive.com
>
> > and have not
> >really had to fix anything for the last 10 years. I put it back
> >together and went for a test drive, the truck started sputtering and
> >the stalled. I got it in the garage luckily and from that point foward
> >it would not start, When I crank it over the carb (then a holley 750)
> >started shoting fuel out of the overflow vents, I adjusted what I
> >could and replaced the needles. This didnt fix the problem, I then
> >changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
> >before. Still not the problem. I the replaced the carb with a new
> >deamon 750 cfm and was sure that this was the problem but to my
> >suprise on the first crank fuel came out the overflow tubes. So now im
> >compleatly lost as to why im having this problem, Is there something
> >im forgetting, or something ive may have screwed up putting the motor
> >back together.Im truley at a loss right now and dont want to burn my
> >house down, I shuld add that the fuel comes out of the overflow tubes
> >about 3 inches high when i try and crank it over. Thanks, chris



Thanks don, I have a new in line filter all new fuel lines, dumped the
tahk and put new gas in it already? During the rebuld that was all
done.

On 17 Feb 2007 18:27:24 -0800, "59Fleetside" >
wrote:

>On Feb 17, 6:19 pm, Don > wrote:
>> On 17 Feb 2007 09:32:02 -0800, "59Fleetside" >
>> wrote:
>>
>> >Hello, Ok In a nutshell i have a fairly high performance 383 stroker
>> >(505 HP) and this winter i pulled apart te motor and replaced all of
>> >the gaskets, I only drive it about 500 miles per year
>>
>> That's why there's crap in your fuel. You could have rubber hoses
>> deteriorating, metal lines rusting, whatever. You need to install an
>> inline filter right at the car inlet. The problem is grit getting
>> stuck between the needle(s) and seat(s) preventing the needle and seat
>> valve(s) from closing.
>>
>> Bet my shop on it.
>>
>> Donwww.donsautomotive.com
>>
>> > and have not
>> >really had to fix anything for the last 10 years. I put it back
>> >together and went for a test drive, the truck started sputtering and
>> >the stalled. I got it in the garage luckily and from that point foward
>> >it would not start, When I crank it over the carb (then a holley 750)
>> >started shoting fuel out of the overflow vents, I adjusted what I
>> >could and replaced the needles. This didnt fix the problem, I then
>> >changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
>> >before. Still not the problem. I the replaced the carb with a new
>> >deamon 750 cfm and was sure that this was the problem but to my
>> >suprise on the first crank fuel came out the overflow tubes. So now im
>> >compleatly lost as to why im having this problem, Is there something
>> >im forgetting, or something ive may have screwed up putting the motor
>> >back together.Im truley at a loss right now and dont want to burn my
>> >house down, I shuld add that the fuel comes out of the overflow tubes
>> >about 3 inches high when i try and crank it over. Thanks, chris
>
>
>
>Thanks don, I have a new in line filter all new fuel lines, dumped the
>tahk and put new gas in it already? During the rebuld that was all
>done.

Is the line AFTER the filter clean?

Don
www.donsautomotive.com

59Fleetside wrote:
> On Feb 17, 6:19 pm, Don > wrote:
>> On 17 Feb 2007 09:32:02 -0800, "59Fleetside" >
>> wrote:
>>
>>> Hello, Ok In a nutshell i have a fairly high performance 383 stroker
>>> (505 HP) and this winter i pulled apart te motor and replaced all of
>>> the gaskets, I only drive it about 500 miles per year
>> That's why there's crap in your fuel. You could have rubber hoses
>> deteriorating, metal lines rusting, whatever. You need to install an
>> inline filter right at the car inlet. The problem is grit getting
>> stuck between the needle(s) and seat(s) preventing the needle and seat
>> valve(s) from closing.
>>
>> Bet my shop on it.
>>
>> Donwww.donsautomotive.com
>>
>>> and have not
>>> really had to fix anything for the last 10 years. I put it back
>>> together and went for a test drive, the truck started sputtering and
>>> the stalled. I got it in the garage luckily and from that point foward
>>> it would not start, When I crank it over the carb (then a holley 750)
>>> started shoting fuel out of the overflow vents, I adjusted what I
>>> could and replaced the needles. This didnt fix the problem, I then
>>> changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
>>> before. Still not the problem. I the replaced the carb with a new
>>> deamon 750 cfm and was sure that this was the problem but to my
>>> suprise on the first crank fuel came out the overflow tubes. So now im
>>> compleatly lost as to why im having this problem, Is there something
>>> im forgetting, or something ive may have screwed up putting the motor
>>> back together.Im truley at a loss right now and dont want to burn my
>>> house down, I shuld add that the fuel comes out of the overflow tubes
>>> about 3 inches high when i try and crank it over. Thanks, chris
>
>
>
> Thanks don, I have a new in line filter all new fuel lines, dumped the
> tahk and put new gas in it already? During the rebuld that was all
> done.
>

I find on old Jeeps the crud is in the gas line between the filter and
carb. If this doesn't get cleaned well, the carbs have recurring float
troubles like you describe.

The gas line on the Jeeps has a dip just before the carb. When the Jeep
sits, the gas evaporates and all the crud collects in this dip. A ream
out with a wire and rag soaked in carb cleaner something like a gun
cleaner gets an amazing amount of junk out.

I also find the 'new' gas mixes are really really bad for leaving a
varnish like crud which glues up the float needle and gums up it's seat
so I have to take my float and needle out every year or so and clean the
sucker or replace it.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

On Feb 18, 12:04 am, Don > wrote:
> On 17 Feb 2007 18:27:24 -0800, "59Fleetside" >
> wrote:
>
>
>
> >On Feb 17, 6:19 pm, Don > wrote:
> >> On 17 Feb 2007 09:32:02 -0800, "59Fleetside" >
> >> wrote:
>
> >> >Hello, Ok In a nutshell i have a fairly high performance 383 stroker
> >> >(505 HP) and this winter i pulled apart te motor and replaced all of
> >> >the gaskets, I only drive it about 500 miles per year
>
> >> That's why there's crap in your fuel. You could have rubber hoses
> >> deteriorating, metal lines rusting, whatever. You need to install an
> >> inline filter right at the car inlet. The problem is grit getting
> >> stuck between the needle(s) and seat(s) preventing the needle and seat
> >> valve(s) from closing.
>
> >> Bet my shop on it.
>
> >> Donwww.donsautomotive.com
>
> >> > and have not
> >> >really had to fix anything for the last 10 years. I put it back
> >> >together and went for a test drive, the truck started sputtering and
> >> >the stalled. I got it in the garage luckily and from that point foward
> >> >it would not start, When I crank it over the carb (then a holley 750)
> >> >started shoting fuel out of the overflow vents, I adjusted what I
> >> >could and replaced the needles. This didnt fix the problem, I then
> >> >changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
> >> >before. Still not the problem. I the replaced the carb with a new
> >> >deamon 750 cfm and was sure that this was the problem but to my
> >> >suprise on the first crank fuel came out the overflow tubes. So now im
> >> >compleatly lost as to why im having this problem, Is there something
> >> >im forgetting, or something ive may have screwed up putting the motor
> >> >back together.Im truley at a loss right now and dont want to burn my
> >> >house down, I shuld add that the fuel comes out of the overflow tubes
> >> >about 3 inches high when i try and crank it over. Thanks, chris
>
> >Thanks don, I have a new in line filter all new fuel lines, dumped the
> >tahk and put new gas in it already? During the rebuld that was all
> >done.
>
> Is the line AFTER the filter clean?
>
> Thanks everyone, Its a brand new fuel line all the way to the carb

On 18 Feb 2007 16:13:44 -0800, "59Fleetside" >
wrote:

>On Feb 18, 12:04 am, Don > wrote:
>> On 17 Feb 2007 18:27:24 -0800, "59Fleetside" >
>> wrote:
>>
>>
>>
>> >On Feb 17, 6:19 pm, Don > wrote:
>> >> On 17 Feb 2007 09:32:02 -0800, "59Fleetside" >
>> >> wrote:
>>
>> >> >Hello, Ok In a nutshell i have a fairly high performance 383 stroker
>> >> >(505 HP) and this winter i pulled apart te motor and replaced all of
>> >> >the gaskets, I only drive it about 500 miles per year
>>
>> >> That's why there's crap in your fuel. You could have rubber hoses
>> >> deteriorating, metal lines rusting, whatever. You need to install an
>> >> inline filter right at the car inlet. The problem is grit getting
>> >> stuck between the needle(s) and seat(s) preventing the needle and seat
>> >> valve(s) from closing.
>>
>> >> Bet my shop on it.
>>
>> >> Donwww.donsautomotive.com
>>
>> >> > and have not
>> >> >really had to fix anything for the last 10 years. I put it back
>> >> >together and went for a test drive, the truck started sputtering and
>> >> >the stalled. I got it in the garage luckily and from that point foward
>> >> >it would not start, When I crank it over the carb (then a holley 750)
>> >> >started shoting fuel out of the overflow vents, I adjusted what I
>> >> >could and replaced the needles. This didnt fix the problem, I then
>> >> >changed the fuel pump to t a 5-7 psi 110gph, similar to what it had
>> >> >before. Still not the problem. I the replaced the carb with a new
>> >> >deamon 750 cfm and was sure that this was the problem but to my
>> >> >suprise on the first crank fuel came out the overflow tubes. So now im
>> >> >compleatly lost as to why im having this problem, Is there something
>> >> >im forgetting, or something ive may have screwed up putting the motor
>> >> >back together.Im truley at a loss right now and dont want to burn my
>> >> >house down, I shuld add that the fuel comes out of the overflow tubes
>> >> >about 3 inches high when i try and crank it over. Thanks, chris
>>
>> >Thanks don, I have a new in line filter all new fuel lines, dumped the
>> >tahk and put new gas in it already? During the rebuld that was all
>> >done.
>>
>> Is the line AFTER the filter clean?
>>
>> Thanks everyone, Its a brand new fuel line all the way to the carb

Sometimes Mud Daubers take up residence inside a roll of bulk fuel
line. Seriously!

Don
www.donsautomotive.com