rebuilding a carb this weekend
Guest
Posts: n/a
Re: rebuilding a carb this weekend
Oops, I shouldn't have done that!
The carbon is caused by spark plug misfire, being fired by the next
exhaust blowing it back through the cross flow cam into the intake. You
may have heard the distinctive bark.
Drag racing you want it as cold, for the most possible gas
expansion, for more horsepower. But it you want your engine to last, put
a 180 degree thermostat in for a compromise in power and SMOG *****.
A miss at idle could an intake vacuum leak over one of the ports,
or again weak spark plugs as that is your highest atmospheric
compression.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
>
> thanks.
The carbon is caused by spark plug misfire, being fired by the next
exhaust blowing it back through the cross flow cam into the intake. You
may have heard the distinctive bark.
Drag racing you want it as cold, for the most possible gas
expansion, for more horsepower. But it you want your engine to last, put
a 180 degree thermostat in for a compromise in power and SMOG *****.
A miss at idle could an intake vacuum leak over one of the ports,
or again weak spark plugs as that is your highest atmospheric
compression.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
>
> thanks.
Guest
Posts: n/a
Re: rebuilding a carb this weekend
Oops, I shouldn't have done that!
The carbon is caused by spark plug misfire, being fired by the next
exhaust blowing it back through the cross flow cam into the intake. You
may have heard the distinctive bark.
Drag racing you want it as cold, for the most possible gas
expansion, for more horsepower. But it you want your engine to last, put
a 180 degree thermostat in for a compromise in power and SMOG *****.
A miss at idle could an intake vacuum leak over one of the ports,
or again weak spark plugs as that is your highest atmospheric
compression.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
>
> thanks.
The carbon is caused by spark plug misfire, being fired by the next
exhaust blowing it back through the cross flow cam into the intake. You
may have heard the distinctive bark.
Drag racing you want it as cold, for the most possible gas
expansion, for more horsepower. But it you want your engine to last, put
a 180 degree thermostat in for a compromise in power and SMOG *****.
A miss at idle could an intake vacuum leak over one of the ports,
or again weak spark plugs as that is your highest atmospheric
compression.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
>
> thanks.
Guest
Posts: n/a
Re: rebuilding a carb this weekend
Oops, I shouldn't have done that!
The carbon is caused by spark plug misfire, being fired by the next
exhaust blowing it back through the cross flow cam into the intake. You
may have heard the distinctive bark.
Drag racing you want it as cold, for the most possible gas
expansion, for more horsepower. But it you want your engine to last, put
a 180 degree thermostat in for a compromise in power and SMOG *****.
A miss at idle could an intake vacuum leak over one of the ports,
or again weak spark plugs as that is your highest atmospheric
compression.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
>
> thanks.
The carbon is caused by spark plug misfire, being fired by the next
exhaust blowing it back through the cross flow cam into the intake. You
may have heard the distinctive bark.
Drag racing you want it as cold, for the most possible gas
expansion, for more horsepower. But it you want your engine to last, put
a 180 degree thermostat in for a compromise in power and SMOG *****.
A miss at idle could an intake vacuum leak over one of the ports,
or again weak spark plugs as that is your highest atmospheric
compression.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
>
> thanks.
Guest
Posts: n/a
Re: rebuilding a carb this weekend
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
I am in Canada and like inside heat and even better defrost so I always
go with a 192 F or close to that. Colder gives really crappie defrost.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
That could be a lean miss. I am not sure with the 360, but the 258 is
really touchy about the best lean idle mix. If I set mine so the
sniffer likes it, it has a slight lope in it. If I set it a 1/4 or 1/2
a turn richer, it goes away.
If the 'lopping' is a surging in idle speeds, then suspect a bad purge
valve on the charcoal canister.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
I am in Canada and like inside heat and even better defrost so I always
go with a 192 F or close to that. Colder gives really crappie defrost.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
That could be a lean miss. I am not sure with the 360, but the 258 is
really touchy about the best lean idle mix. If I set mine so the
sniffer likes it, it has a slight lope in it. If I set it a 1/4 or 1/2
a turn richer, it goes away.
If the 'lopping' is a surging in idle speeds, then suspect a bad purge
valve on the charcoal canister.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Guest
Posts: n/a
Re: rebuilding a carb this weekend
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
I am in Canada and like inside heat and even better defrost so I always
go with a 192 F or close to that. Colder gives really crappie defrost.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
That could be a lean miss. I am not sure with the 360, but the 258 is
really touchy about the best lean idle mix. If I set mine so the
sniffer likes it, it has a slight lope in it. If I set it a 1/4 or 1/2
a turn richer, it goes away.
If the 'lopping' is a surging in idle speeds, then suspect a bad purge
valve on the charcoal canister.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
I am in Canada and like inside heat and even better defrost so I always
go with a 192 F or close to that. Colder gives really crappie defrost.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
That could be a lean miss. I am not sure with the 360, but the 258 is
really touchy about the best lean idle mix. If I set mine so the
sniffer likes it, it has a slight lope in it. If I set it a 1/4 or 1/2
a turn richer, it goes away.
If the 'lopping' is a surging in idle speeds, then suspect a bad purge
valve on the charcoal canister.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Guest
Posts: n/a
Re: rebuilding a carb this weekend
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
I am in Canada and like inside heat and even better defrost so I always
go with a 192 F or close to that. Colder gives really crappie defrost.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
That could be a lean miss. I am not sure with the 360, but the 258 is
really touchy about the best lean idle mix. If I set mine so the
sniffer likes it, it has a slight lope in it. If I set it a 1/4 or 1/2
a turn richer, it goes away.
If the 'lopping' is a surging in idle speeds, then suspect a bad purge
valve on the charcoal canister.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
I am in Canada and like inside heat and even better defrost so I always
go with a 192 F or close to that. Colder gives really crappie defrost.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
That could be a lean miss. I am not sure with the 360, but the 258 is
really touchy about the best lean idle mix. If I set mine so the
sniffer likes it, it has a slight lope in it. If I set it a 1/4 or 1/2
a turn richer, it goes away.
If the 'lopping' is a surging in idle speeds, then suspect a bad purge
valve on the charcoal canister.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Guest
Posts: n/a
Re: rebuilding a carb this weekend
"rottyguy70@yahoo.com" wrote:
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
I am in Canada and like inside heat and even better defrost so I always
go with a 192 F or close to that. Colder gives really crappie defrost.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
That could be a lean miss. I am not sure with the 360, but the 258 is
really touchy about the best lean idle mix. If I set mine so the
sniffer likes it, it has a slight lope in it. If I set it a 1/4 or 1/2
a turn richer, it goes away.
If the 'lopping' is a surging in idle speeds, then suspect a bad purge
valve on the charcoal canister.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> well, got the carb rebuilt. not too bad, almost lost a few pieces when
> it blew off the table :-/
>
> had a few questions:
>
> 1) the carb had a bunch of carbon pebbles.. what's the cause and remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
>
> 2) what's the optimum temp for a small block 350? i've got a good
> cooling system so can pretty much nail the sensor spot on.
I am in Canada and like inside heat and even better defrost so I always
go with a 192 F or close to that. Colder gives really crappie defrost.
>
> 3) engine is idling loppy if that makes any sense. almost sounds like
> a misfire at low speed (say 25 and under). once you step on the gas,
> it seems normal. any thoughts?
That could be a lean miss. I am not sure with the 360, but the 258 is
really touchy about the best lean idle mix. If I set mine so the
sniffer likes it, it has a slight lope in it. If I set it a 1/4 or 1/2
a turn richer, it goes away.
If the 'lopping' is a surging in idle speeds, then suspect a bad purge
valve on the charcoal canister.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Guest
Posts: n/a
Re: rebuilding a carb this weekend
yes i think you're right. the pebbles were curiously large. i'll try
and swap out the cannister (it's prolly 20 years old) and add the
filter as you recommended. isn't the charcoal usually bagged w/in the
cannister? i'm concerned there may have been internal damage before
discovery (i say there was a good 3 or 4 spoons in there). any
possibility of that?
> 1) the carb had a bunch of carbon pebbles.. what's the cause and
remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best
fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
and swap out the cannister (it's prolly 20 years old) and add the
filter as you recommended. isn't the charcoal usually bagged w/in the
cannister? i'm concerned there may have been internal damage before
discovery (i say there was a good 3 or 4 spoons in there). any
possibility of that?
> 1) the carb had a bunch of carbon pebbles.. what's the cause and
remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best
fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
Guest
Posts: n/a
Re: rebuilding a carb this weekend
yes i think you're right. the pebbles were curiously large. i'll try
and swap out the cannister (it's prolly 20 years old) and add the
filter as you recommended. isn't the charcoal usually bagged w/in the
cannister? i'm concerned there may have been internal damage before
discovery (i say there was a good 3 or 4 spoons in there). any
possibility of that?
> 1) the carb had a bunch of carbon pebbles.. what's the cause and
remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best
fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
and swap out the cannister (it's prolly 20 years old) and add the
filter as you recommended. isn't the charcoal usually bagged w/in the
cannister? i'm concerned there may have been internal damage before
discovery (i say there was a good 3 or 4 spoons in there). any
possibility of that?
> 1) the carb had a bunch of carbon pebbles.. what's the cause and
remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best
fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
Guest
Posts: n/a
Re: rebuilding a carb this weekend
yes i think you're right. the pebbles were curiously large. i'll try
and swap out the cannister (it's prolly 20 years old) and add the
filter as you recommended. isn't the charcoal usually bagged w/in the
cannister? i'm concerned there may have been internal damage before
discovery (i say there was a good 3 or 4 spoons in there). any
possibility of that?
> 1) the carb had a bunch of carbon pebbles.. what's the cause and
remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best
fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
and swap out the cannister (it's prolly 20 years old) and add the
filter as you recommended. isn't the charcoal usually bagged w/in the
cannister? i'm concerned there may have been internal damage before
discovery (i say there was a good 3 or 4 spoons in there). any
possibility of that?
> 1) the carb had a bunch of carbon pebbles.. what's the cause and
remedy
> to this?
That happens when you run out of gas sometimes. The high vacuum
involved trying to start it empty can suck charcoal pellets out of the
canister into the float bowl. My 258 does that sometimes. The best
fix
I have heard of and I should do it is to put a clear gas filter on the
charcoal canister line that goes to the float bowl vent.
