86 CJ-7 Carb
12-06-2003, 12:52 PM
#11
Guest
Posts: n/a
Re: 86 CJ-7 Carb
I can't see how what you are describing works...
The only way a stock system will build up any pressure in the gas lines
is if the plumbing is done incorrectly.
Properly plumbed, the gas filter in front of the carb has two outlets.
One outlet, the center one, goes to the carb and when the carb float
shuts off the gas flow, the excess gas gets pumped back to the gas tank
via the return line or the top outlet on the filter.
This keeps the gas pressure down to close to 0 psi. The carb will
actually run with a gravity feed from a gas can sitting on the hood if
all else fails for a trail fix.
Now if you have blocked the return line, then the pump can build up
pressure, but it also will vapor lock like a bugger in really hot
weather.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> for about $300. now my jeep starts great cold or hot, idles and stopped
> blowing out black smoke. one thing I had to add on my jeep was a holley low
> fuel pressure regulator (around $25 from jegs.com) because the weber need
> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> off the excess pressure into the carb and causing it to blow black smoke
> when I started it when it was hot. carmine
>
> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> news:eGgAb.290$MY.221738@monger.newsread.com...
> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> > find one anywhere!
> >
> >
The only way a stock system will build up any pressure in the gas lines
is if the plumbing is done incorrectly.
Properly plumbed, the gas filter in front of the carb has two outlets.
One outlet, the center one, goes to the carb and when the carb float
shuts off the gas flow, the excess gas gets pumped back to the gas tank
via the return line or the top outlet on the filter.
This keeps the gas pressure down to close to 0 psi. The carb will
actually run with a gravity feed from a gas can sitting on the hood if
all else fails for a trail fix.
Now if you have blocked the return line, then the pump can build up
pressure, but it also will vapor lock like a bugger in really hot
weather.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> for about $300. now my jeep starts great cold or hot, idles and stopped
> blowing out black smoke. one thing I had to add on my jeep was a holley low
> fuel pressure regulator (around $25 from jegs.com) because the weber need
> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> off the excess pressure into the carb and causing it to blow black smoke
> when I started it when it was hot. carmine
>
> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> news:eGgAb.290$MY.221738@monger.newsread.com...
> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> > find one anywhere!
> >
> >
12-06-2003, 12:52 PM
#12
Guest
Posts: n/a
Re: 86 CJ-7 Carb
I can't see how what you are describing works...
The only way a stock system will build up any pressure in the gas lines
is if the plumbing is done incorrectly.
Properly plumbed, the gas filter in front of the carb has two outlets.
One outlet, the center one, goes to the carb and when the carb float
shuts off the gas flow, the excess gas gets pumped back to the gas tank
via the return line or the top outlet on the filter.
This keeps the gas pressure down to close to 0 psi. The carb will
actually run with a gravity feed from a gas can sitting on the hood if
all else fails for a trail fix.
Now if you have blocked the return line, then the pump can build up
pressure, but it also will vapor lock like a bugger in really hot
weather.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> for about $300. now my jeep starts great cold or hot, idles and stopped
> blowing out black smoke. one thing I had to add on my jeep was a holley low
> fuel pressure regulator (around $25 from jegs.com) because the weber need
> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> off the excess pressure into the carb and causing it to blow black smoke
> when I started it when it was hot. carmine
>
> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> news:eGgAb.290$MY.221738@monger.newsread.com...
> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> > find one anywhere!
> >
> >
The only way a stock system will build up any pressure in the gas lines
is if the plumbing is done incorrectly.
Properly plumbed, the gas filter in front of the carb has two outlets.
One outlet, the center one, goes to the carb and when the carb float
shuts off the gas flow, the excess gas gets pumped back to the gas tank
via the return line or the top outlet on the filter.
This keeps the gas pressure down to close to 0 psi. The carb will
actually run with a gravity feed from a gas can sitting on the hood if
all else fails for a trail fix.
Now if you have blocked the return line, then the pump can build up
pressure, but it also will vapor lock like a bugger in really hot
weather.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> for about $300. now my jeep starts great cold or hot, idles and stopped
> blowing out black smoke. one thing I had to add on my jeep was a holley low
> fuel pressure regulator (around $25 from jegs.com) because the weber need
> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> off the excess pressure into the carb and causing it to blow black smoke
> when I started it when it was hot. carmine
>
> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> news:eGgAb.290$MY.221738@monger.newsread.com...
> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> > find one anywhere!
> >
> >
12-06-2003, 12:52 PM
#13
Guest
Posts: n/a
Re: 86 CJ-7 Carb
I can't see how what you are describing works...
The only way a stock system will build up any pressure in the gas lines
is if the plumbing is done incorrectly.
Properly plumbed, the gas filter in front of the carb has two outlets.
One outlet, the center one, goes to the carb and when the carb float
shuts off the gas flow, the excess gas gets pumped back to the gas tank
via the return line or the top outlet on the filter.
This keeps the gas pressure down to close to 0 psi. The carb will
actually run with a gravity feed from a gas can sitting on the hood if
all else fails for a trail fix.
Now if you have blocked the return line, then the pump can build up
pressure, but it also will vapor lock like a bugger in really hot
weather.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> for about $300. now my jeep starts great cold or hot, idles and stopped
> blowing out black smoke. one thing I had to add on my jeep was a holley low
> fuel pressure regulator (around $25 from jegs.com) because the weber need
> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> off the excess pressure into the carb and causing it to blow black smoke
> when I started it when it was hot. carmine
>
> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> news:eGgAb.290$MY.221738@monger.newsread.com...
> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> > find one anywhere!
> >
> >
The only way a stock system will build up any pressure in the gas lines
is if the plumbing is done incorrectly.
Properly plumbed, the gas filter in front of the carb has two outlets.
One outlet, the center one, goes to the carb and when the carb float
shuts off the gas flow, the excess gas gets pumped back to the gas tank
via the return line or the top outlet on the filter.
This keeps the gas pressure down to close to 0 psi. The carb will
actually run with a gravity feed from a gas can sitting on the hood if
all else fails for a trail fix.
Now if you have blocked the return line, then the pump can build up
pressure, but it also will vapor lock like a bugger in really hot
weather.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> for about $300. now my jeep starts great cold or hot, idles and stopped
> blowing out black smoke. one thing I had to add on my jeep was a holley low
> fuel pressure regulator (around $25 from jegs.com) because the weber need
> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> off the excess pressure into the carb and causing it to blow black smoke
> when I started it when it was hot. carmine
>
> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> news:eGgAb.290$MY.221738@monger.newsread.com...
> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> > find one anywhere!
> >
> >
12-06-2003, 02:00 PM
#14
Guest
Posts: n/a
Re: 86 CJ-7 Carb
On or about Sat, 6 Dec 2003, Kenneth Reichenbach Jr. of kenwr@enter.net wrote:
> I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> find one anywhere!
My local AutoZone had a reman 2bbl for my `79 I-258, $ 115 plus core.
Works great. YMMV.
> I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> find one anywhere!
My local AutoZone had a reman 2bbl for my `79 I-258, $ 115 plus core.
Works great. YMMV.
12-06-2003, 02:00 PM
#15
Guest
Posts: n/a
Re: 86 CJ-7 Carb
On or about Sat, 6 Dec 2003, Kenneth Reichenbach Jr. of kenwr@enter.net wrote:
> I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> find one anywhere!
My local AutoZone had a reman 2bbl for my `79 I-258, $ 115 plus core.
Works great. YMMV.
> I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> find one anywhere!
My local AutoZone had a reman 2bbl for my `79 I-258, $ 115 plus core.
Works great. YMMV.
12-06-2003, 02:00 PM
#16
Guest
Posts: n/a
Re: 86 CJ-7 Carb
On or about Sat, 6 Dec 2003, Kenneth Reichenbach Jr. of kenwr@enter.net wrote:
> I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> find one anywhere!
My local AutoZone had a reman 2bbl for my `79 I-258, $ 115 plus core.
Works great. YMMV.
> I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> find one anywhere!
My local AutoZone had a reman 2bbl for my `79 I-258, $ 115 plus core.
Works great. YMMV.
12-06-2003, 03:50 PM
#17
Guest
Posts: n/a
Re: 86 CJ-7 Carb
In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
>I can't see how what you are describing works...
>
>The only way a stock system will build up any pressure in the gas lines
>is if the plumbing is done incorrectly.
>
>Properly plumbed, the gas filter in front of the carb has two outlets.
>One outlet, the center one, goes to the carb and when the carb float
>shuts off the gas flow, the excess gas gets pumped back to the gas tank
>via the return line or the top outlet on the filter.
>
>This keeps the gas pressure down to close to 0 psi. The carb will
>actually run with a gravity feed from a gas can sitting on the hood if
>all else fails for a trail fix.
Actually, they operate around 3-5 psi if I remember correctly. There is an
orifice in the return nipple of the filter that restricts fuel flow back to the
tank.
>
>Now if you have blocked the return line, then the pump can build up
>pressure, but it also will vapor lock like a bugger in really hot
>weather.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>Jet wrote:
>>
>> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
>> for about $300. now my jeep starts great cold or hot, idles and stopped
>> blowing out black smoke. one thing I had to add on my jeep was a holley low
>> fuel pressure regulator (around $25 from jegs.com) because the weber need
>> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
>> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
>> off the excess pressure into the carb and causing it to blow black smoke
>> when I started it when it was hot. carmine
>>
>> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
>> news:eGgAb.290$MY.221738@monger.newsread.com...
>> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
>> > find one anywhere!
>> >
>> >
>I can't see how what you are describing works...
>
>The only way a stock system will build up any pressure in the gas lines
>is if the plumbing is done incorrectly.
>
>Properly plumbed, the gas filter in front of the carb has two outlets.
>One outlet, the center one, goes to the carb and when the carb float
>shuts off the gas flow, the excess gas gets pumped back to the gas tank
>via the return line or the top outlet on the filter.
>
>This keeps the gas pressure down to close to 0 psi. The carb will
>actually run with a gravity feed from a gas can sitting on the hood if
>all else fails for a trail fix.
Actually, they operate around 3-5 psi if I remember correctly. There is an
orifice in the return nipple of the filter that restricts fuel flow back to the
tank.
>
>Now if you have blocked the return line, then the pump can build up
>pressure, but it also will vapor lock like a bugger in really hot
>weather.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>Jet wrote:
>>
>> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
>> for about $300. now my jeep starts great cold or hot, idles and stopped
>> blowing out black smoke. one thing I had to add on my jeep was a holley low
>> fuel pressure regulator (around $25 from jegs.com) because the weber need
>> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
>> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
>> off the excess pressure into the carb and causing it to blow black smoke
>> when I started it when it was hot. carmine
>>
>> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
>> news:eGgAb.290$MY.221738@monger.newsread.com...
>> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
>> > find one anywhere!
>> >
>> >
12-06-2003, 03:50 PM
#18
Guest
Posts: n/a
Re: 86 CJ-7 Carb
In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
>I can't see how what you are describing works...
>
>The only way a stock system will build up any pressure in the gas lines
>is if the plumbing is done incorrectly.
>
>Properly plumbed, the gas filter in front of the carb has two outlets.
>One outlet, the center one, goes to the carb and when the carb float
>shuts off the gas flow, the excess gas gets pumped back to the gas tank
>via the return line or the top outlet on the filter.
>
>This keeps the gas pressure down to close to 0 psi. The carb will
>actually run with a gravity feed from a gas can sitting on the hood if
>all else fails for a trail fix.
Actually, they operate around 3-5 psi if I remember correctly. There is an
orifice in the return nipple of the filter that restricts fuel flow back to the
tank.
>
>Now if you have blocked the return line, then the pump can build up
>pressure, but it also will vapor lock like a bugger in really hot
>weather.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>Jet wrote:
>>
>> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
>> for about $300. now my jeep starts great cold or hot, idles and stopped
>> blowing out black smoke. one thing I had to add on my jeep was a holley low
>> fuel pressure regulator (around $25 from jegs.com) because the weber need
>> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
>> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
>> off the excess pressure into the carb and causing it to blow black smoke
>> when I started it when it was hot. carmine
>>
>> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
>> news:eGgAb.290$MY.221738@monger.newsread.com...
>> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
>> > find one anywhere!
>> >
>> >
>I can't see how what you are describing works...
>
>The only way a stock system will build up any pressure in the gas lines
>is if the plumbing is done incorrectly.
>
>Properly plumbed, the gas filter in front of the carb has two outlets.
>One outlet, the center one, goes to the carb and when the carb float
>shuts off the gas flow, the excess gas gets pumped back to the gas tank
>via the return line or the top outlet on the filter.
>
>This keeps the gas pressure down to close to 0 psi. The carb will
>actually run with a gravity feed from a gas can sitting on the hood if
>all else fails for a trail fix.
Actually, they operate around 3-5 psi if I remember correctly. There is an
orifice in the return nipple of the filter that restricts fuel flow back to the
tank.
>
>Now if you have blocked the return line, then the pump can build up
>pressure, but it also will vapor lock like a bugger in really hot
>weather.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>Jet wrote:
>>
>> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
>> for about $300. now my jeep starts great cold or hot, idles and stopped
>> blowing out black smoke. one thing I had to add on my jeep was a holley low
>> fuel pressure regulator (around $25 from jegs.com) because the weber need
>> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
>> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
>> off the excess pressure into the carb and causing it to blow black smoke
>> when I started it when it was hot. carmine
>>
>> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
>> news:eGgAb.290$MY.221738@monger.newsread.com...
>> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
>> > find one anywhere!
>> >
>> >
12-06-2003, 03:50 PM
#19
Guest
Posts: n/a
Re: 86 CJ-7 Carb
In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
>I can't see how what you are describing works...
>
>The only way a stock system will build up any pressure in the gas lines
>is if the plumbing is done incorrectly.
>
>Properly plumbed, the gas filter in front of the carb has two outlets.
>One outlet, the center one, goes to the carb and when the carb float
>shuts off the gas flow, the excess gas gets pumped back to the gas tank
>via the return line or the top outlet on the filter.
>
>This keeps the gas pressure down to close to 0 psi. The carb will
>actually run with a gravity feed from a gas can sitting on the hood if
>all else fails for a trail fix.
Actually, they operate around 3-5 psi if I remember correctly. There is an
orifice in the return nipple of the filter that restricts fuel flow back to the
tank.
>
>Now if you have blocked the return line, then the pump can build up
>pressure, but it also will vapor lock like a bugger in really hot
>weather.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>Jet wrote:
>>
>> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
>> for about $300. now my jeep starts great cold or hot, idles and stopped
>> blowing out black smoke. one thing I had to add on my jeep was a holley low
>> fuel pressure regulator (around $25 from jegs.com) because the weber need
>> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
>> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
>> off the excess pressure into the carb and causing it to blow black smoke
>> when I started it when it was hot. carmine
>>
>> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
>> news:eGgAb.290$MY.221738@monger.newsread.com...
>> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
>> > find one anywhere!
>> >
>> >
>I can't see how what you are describing works...
>
>The only way a stock system will build up any pressure in the gas lines
>is if the plumbing is done incorrectly.
>
>Properly plumbed, the gas filter in front of the carb has two outlets.
>One outlet, the center one, goes to the carb and when the carb float
>shuts off the gas flow, the excess gas gets pumped back to the gas tank
>via the return line or the top outlet on the filter.
>
>This keeps the gas pressure down to close to 0 psi. The carb will
>actually run with a gravity feed from a gas can sitting on the hood if
>all else fails for a trail fix.
Actually, they operate around 3-5 psi if I remember correctly. There is an
orifice in the return nipple of the filter that restricts fuel flow back to the
tank.
>
>Now if you have blocked the return line, then the pump can build up
>pressure, but it also will vapor lock like a bugger in really hot
>weather.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>
>Jet wrote:
>>
>> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
>> for about $300. now my jeep starts great cold or hot, idles and stopped
>> blowing out black smoke. one thing I had to add on my jeep was a holley low
>> fuel pressure regulator (around $25 from jegs.com) because the weber need
>> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
>> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
>> off the excess pressure into the carb and causing it to blow black smoke
>> when I started it when it was hot. carmine
>>
>> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
>> news:eGgAb.290$MY.221738@monger.newsread.com...
>> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
>> > find one anywhere!
>> >
>> >
12-06-2003, 04:42 PM
#20
Guest
Posts: n/a
Re: 86 CJ-7 Carb
bllsht wrote:
>
> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
>
> >I can't see how what you are describing works...
> >
> >The only way a stock system will build up any pressure in the gas lines
> >is if the plumbing is done incorrectly.
> >
> >Properly plumbed, the gas filter in front of the carb has two outlets.
> >One outlet, the center one, goes to the carb and when the carb float
> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
> >via the return line or the top outlet on the filter.
> >
> >This keeps the gas pressure down to close to 0 psi. The carb will
> >actually run with a gravity feed from a gas can sitting on the hood if
> >all else fails for a trail fix.
>
> Actually, they operate around 3-5 psi if I remember correctly. There is an
> orifice in the return nipple of the filter that restricts fuel flow back to the
> tank.
Ok, I have noticed the filter bypass tube will blow through when the
center one to the carb is dirty and blocked, but didn't think that much
pressure was needed. Seemed like the difference between the tube sizes
for a restriction, hard to tell just blowing air though.
Now I see why one might need a regulator, thanks.
Gent below sounds like he blocked the return line. The filter will
bleed off to 0 psi almost instantly otherwise.
I wonder if you could drill out the restriction in the filter return
line to lower the pressure fast and cheap or if it just a tube size
restriction?
Mike
>
> >
> >Now if you have blocked the return line, then the pump can build up
> >pressure, but it also will vapor lock like a bugger in really hot
> >weather.
> >
> >Mike
> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >88 Cherokee 235 BFG AT's
> >
> >Jet wrote:
> >>
> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> >> for about $300. now my jeep starts great cold or hot, idles and stopped
> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> >> off the excess pressure into the carb and causing it to blow black smoke
> >> when I started it when it was hot. carmine
> >>
> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> >> news:eGgAb.290$MY.221738@monger.newsread.com...
> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> >> > find one anywhere!
> >> >
> >> >
>
> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
>
> >I can't see how what you are describing works...
> >
> >The only way a stock system will build up any pressure in the gas lines
> >is if the plumbing is done incorrectly.
> >
> >Properly plumbed, the gas filter in front of the carb has two outlets.
> >One outlet, the center one, goes to the carb and when the carb float
> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
> >via the return line or the top outlet on the filter.
> >
> >This keeps the gas pressure down to close to 0 psi. The carb will
> >actually run with a gravity feed from a gas can sitting on the hood if
> >all else fails for a trail fix.
>
> Actually, they operate around 3-5 psi if I remember correctly. There is an
> orifice in the return nipple of the filter that restricts fuel flow back to the
> tank.
Ok, I have noticed the filter bypass tube will blow through when the
center one to the carb is dirty and blocked, but didn't think that much
pressure was needed. Seemed like the difference between the tube sizes
for a restriction, hard to tell just blowing air though.
Now I see why one might need a regulator, thanks.
Gent below sounds like he blocked the return line. The filter will
bleed off to 0 psi almost instantly otherwise.
I wonder if you could drill out the restriction in the filter return
line to lower the pressure fast and cheap or if it just a tube size
restriction?
Mike
>
> >
> >Now if you have blocked the return line, then the pump can build up
> >pressure, but it also will vapor lock like a bugger in really hot
> >weather.
> >
> >Mike
> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >88 Cherokee 235 BFG AT's
> >
> >Jet wrote:
> >>
> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> >> for about $300. now my jeep starts great cold or hot, idles and stopped
> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> >> off the excess pressure into the carb and causing it to blow black smoke
> >> when I started it when it was hot. carmine
> >>
> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> >> news:eGgAb.290$MY.221738@monger.newsread.com...
> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> >> > find one anywhere!
> >> >
> >> >
