I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and one
of those terrible Carter carburetors with a Nutter bypass performed. Keep
in mind with this question that the catalytic converter needs to be replaced
and another one is on order. Here's the present trouble: The stepper motor,
which I believe controls the amount of fuel, has been disconnected as part
of the bypass. The gas to air ratio is too rich and there is really no way
to adjust it, or so I'm told. I'm not sure how much the catalytic converter
has to do with this but, how can the fuel mixture be adjusted with the
bypass in place?



Thanks,

Chip

 

did u make sure the stepper motor was in the right position before turning
it off? i never did the nutter bypass in mine before i took it off but i
remember you had to have the motor in a certain position before cutting the
wire. is your 02 sensor alive?

"Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
one
> of those terrible Carter carburetors with a Nutter bypass performed. Keep
> in mind with this question that the catalytic converter needs to be
replaced
> and another one is on order. Here's the present trouble: The stepper
motor,
> which I believe controls the amount of fuel, has been disconnected as part
> of the bypass. The gas to air ratio is too rich and there is really no way
> to adjust it, or so I'm told. I'm not sure how much the catalytic
converter
> has to do with this but, how can the fuel mixture be adjusted with the
> bypass in place?
>
>
>
> Thanks,
>
> Chip
>
>
>
>
>
>

 

did u make sure the stepper motor was in the right position before turning
it off? i never did the nutter bypass in mine before i took it off but i
remember you had to have the motor in a certain position before cutting the
wire. is your 02 sensor alive?

"Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
one
> of those terrible Carter carburetors with a Nutter bypass performed. Keep
> in mind with this question that the catalytic converter needs to be
replaced
> and another one is on order. Here's the present trouble: The stepper
motor,
> which I believe controls the amount of fuel, has been disconnected as part
> of the bypass. The gas to air ratio is too rich and there is really no way
> to adjust it, or so I'm told. I'm not sure how much the catalytic
converter
> has to do with this but, how can the fuel mixture be adjusted with the
> bypass in place?
>
>
>
> Thanks,
>
> Chip
>
>
>
>
>
>

 

did u make sure the stepper motor was in the right position before turning
it off? i never did the nutter bypass in mine before i took it off but i
remember you had to have the motor in a certain position before cutting the
wire. is your 02 sensor alive?

"Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
one
> of those terrible Carter carburetors with a Nutter bypass performed. Keep
> in mind with this question that the catalytic converter needs to be
replaced
> and another one is on order. Here's the present trouble: The stepper
motor,
> which I believe controls the amount of fuel, has been disconnected as part
> of the bypass. The gas to air ratio is too rich and there is really no way
> to adjust it, or so I'm told. I'm not sure how much the catalytic
converter
> has to do with this but, how can the fuel mixture be adjusted with the
> bypass in place?
>
>
>
> Thanks,
>
> Chip
>
>
>
>
>
>

 

did u make sure the stepper motor was in the right position before turning
it off? i never did the nutter bypass in mine before i took it off but i
remember you had to have the motor in a certain position before cutting the
wire. is your 02 sensor alive?

"Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
one
> of those terrible Carter carburetors with a Nutter bypass performed. Keep
> in mind with this question that the catalytic converter needs to be
replaced
> and another one is on order. Here's the present trouble: The stepper
motor,
> which I believe controls the amount of fuel, has been disconnected as part
> of the bypass. The gas to air ratio is too rich and there is really no way
> to adjust it, or so I'm told. I'm not sure how much the catalytic
converter
> has to do with this but, how can the fuel mixture be adjusted with the
> bypass in place?
>
>
>
> Thanks,
>
> Chip
>
>
>
>
>
>

 

The computer was not functioning so the stepper motor was inoperable (or at
least was not being run by the bad computer) Before the bypass was
complete, my father started the motor, it ran terrible until he uplugged the
stepper motor, then it ran smooth. How can you tell where the stepper motor
should be and how do you get it there if it is in the wrong place, which it
obviously is because of the amount of gas running through it.

Short of solving this carb trouble, what kind of pre-83 carb will fit the
150 engine?

Thanks again,

Chip


"serg" <sfonNOSPAM@yahoo.com> wrote in message
news:2gad30Fiu7bU1@uni-berlin.de...
> did u make sure the stepper motor was in the right position before turning
> it off? i never did the nutter bypass in mine before i took it off but i
> remember you had to have the motor in a certain position before cutting
the
> wire. is your 02 sensor alive?
>
> "Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
> news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> > I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
> one
> > of those terrible Carter carburetors with a Nutter bypass performed.
Keep
> > in mind with this question that the catalytic converter needs to be
> replaced
> > and another one is on order. Here's the present trouble: The stepper
> motor,
> > which I believe controls the amount of fuel, has been disconnected as
part
> > of the bypass. The gas to air ratio is too rich and there is really no
way
> > to adjust it, or so I'm told. I'm not sure how much the catalytic
> converter
> > has to do with this but, how can the fuel mixture be adjusted with the
> > bypass in place?
> >
> >
> >
> > Thanks,
> >
> > Chip
> >
> >
> >
> >
> >
> >
>
>

 

The computer was not functioning so the stepper motor was inoperable (or at
least was not being run by the bad computer) Before the bypass was
complete, my father started the motor, it ran terrible until he uplugged the
stepper motor, then it ran smooth. How can you tell where the stepper motor
should be and how do you get it there if it is in the wrong place, which it
obviously is because of the amount of gas running through it.

Short of solving this carb trouble, what kind of pre-83 carb will fit the
150 engine?

Thanks again,

Chip


"serg" <sfonNOSPAM@yahoo.com> wrote in message
news:2gad30Fiu7bU1@uni-berlin.de...
> did u make sure the stepper motor was in the right position before turning
> it off? i never did the nutter bypass in mine before i took it off but i
> remember you had to have the motor in a certain position before cutting
the
> wire. is your 02 sensor alive?
>
> "Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
> news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> > I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
> one
> > of those terrible Carter carburetors with a Nutter bypass performed.
Keep
> > in mind with this question that the catalytic converter needs to be
> replaced
> > and another one is on order. Here's the present trouble: The stepper
> motor,
> > which I believe controls the amount of fuel, has been disconnected as
part
> > of the bypass. The gas to air ratio is too rich and there is really no
way
> > to adjust it, or so I'm told. I'm not sure how much the catalytic
> converter
> > has to do with this but, how can the fuel mixture be adjusted with the
> > bypass in place?
> >
> >
> >
> > Thanks,
> >
> > Chip
> >
> >
> >
> >
> >
> >
>
>

 

The computer was not functioning so the stepper motor was inoperable (or at
least was not being run by the bad computer) Before the bypass was
complete, my father started the motor, it ran terrible until he uplugged the
stepper motor, then it ran smooth. How can you tell where the stepper motor
should be and how do you get it there if it is in the wrong place, which it
obviously is because of the amount of gas running through it.

Short of solving this carb trouble, what kind of pre-83 carb will fit the
150 engine?

Thanks again,

Chip


"serg" <sfonNOSPAM@yahoo.com> wrote in message
news:2gad30Fiu7bU1@uni-berlin.de...
> did u make sure the stepper motor was in the right position before turning
> it off? i never did the nutter bypass in mine before i took it off but i
> remember you had to have the motor in a certain position before cutting
the
> wire. is your 02 sensor alive?
>
> "Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
> news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> > I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
> one
> > of those terrible Carter carburetors with a Nutter bypass performed.
Keep
> > in mind with this question that the catalytic converter needs to be
> replaced
> > and another one is on order. Here's the present trouble: The stepper
> motor,
> > which I believe controls the amount of fuel, has been disconnected as
part
> > of the bypass. The gas to air ratio is too rich and there is really no
way
> > to adjust it, or so I'm told. I'm not sure how much the catalytic
> converter
> > has to do with this but, how can the fuel mixture be adjusted with the
> > bypass in place?
> >
> >
> >
> > Thanks,
> >
> > Chip
> >
> >
> >
> >
> >
> >
>
>

 

The computer was not functioning so the stepper motor was inoperable (or at
least was not being run by the bad computer) Before the bypass was
complete, my father started the motor, it ran terrible until he uplugged the
stepper motor, then it ran smooth. How can you tell where the stepper motor
should be and how do you get it there if it is in the wrong place, which it
obviously is because of the amount of gas running through it.

Short of solving this carb trouble, what kind of pre-83 carb will fit the
150 engine?

Thanks again,

Chip


"serg" <sfonNOSPAM@yahoo.com> wrote in message
news:2gad30Fiu7bU1@uni-berlin.de...
> did u make sure the stepper motor was in the right position before turning
> it off? i never did the nutter bypass in mine before i took it off but i
> remember you had to have the motor in a certain position before cutting
the
> wire. is your 02 sensor alive?
>
> "Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
> news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> > I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
> one
> > of those terrible Carter carburetors with a Nutter bypass performed.
Keep
> > in mind with this question that the catalytic converter needs to be
> replaced
> > and another one is on order. Here's the present trouble: The stepper
> motor,
> > which I believe controls the amount of fuel, has been disconnected as
part
> > of the bypass. The gas to air ratio is too rich and there is really no
way
> > to adjust it, or so I'm told. I'm not sure how much the catalytic
> converter
> > has to do with this but, how can the fuel mixture be adjusted with the
> > bypass in place?
> >
> >
> >
> > Thanks,
> >
> > Chip
> >
> >
> >
> >
> >
> >
>
>

 

The stepper motor controls the air bypass only on the Carter BBD carb.
This means full rich is pins all the way in.

I highly doubt you have a Carter BBD on a 4 banger though....

You should check to see what it is. They all are manually tuneable with
'hidden' mix screrws the same as the non electronic ones, but it is hard
to point you the right direction not being sure of the carb...

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Chip wrote:
>
> The computer was not functioning so the stepper motor was inoperable (or at
> least was not being run by the bad computer) Before the bypass was
> complete, my father started the motor, it ran terrible until he uplugged the
> stepper motor, then it ran smooth. How can you tell where the stepper motor
> should be and how do you get it there if it is in the wrong place, which it
> obviously is because of the amount of gas running through it.
>
> Short of solving this carb trouble, what kind of pre-83 carb will fit the
> 150 engine?
>
> Thanks again,
>
> Chip
>
> "serg" <sfonNOSPAM@yahoo.com> wrote in message
> news:2gad30Fiu7bU1@uni-berlin.de...
> > did u make sure the stepper motor was in the right position before turning
> > it off? i never did the nutter bypass in mine before i took it off but i
> > remember you had to have the motor in a certain position before cutting
> the
> > wire. is your 02 sensor alive?
> >
> > "Chip" <cjenkins1@nospam.neo.rr.com> wrote in message
> > news:oRSnc.1090$OE3.804@fe1.columbus.rr.com...
> > > I have a question concerning an '84 CJ with the AMC 150 4 cyl engine and
> > one
> > > of those terrible Carter carburetors with a Nutter bypass performed.
> Keep
> > > in mind with this question that the catalytic converter needs to be
> > replaced
> > > and another one is on order. Here's the present trouble: The stepper
> > motor,
> > > which I believe controls the amount of fuel, has been disconnected as
> part
> > > of the bypass. The gas to air ratio is too rich and there is really no
> way
> > > to adjust it, or so I'm told. I'm not sure how much the catalytic
> > converter
> > > has to do with this but, how can the fuel mixture be adjusted with the
> > > bypass in place?
> > >
> > >
> > >
> > > Thanks,
> > >
> > > Chip
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >