I have gone 4+ years with no stepper and it seems to run ok. But that could
explain why occasionally when I first start up the Jeep it will run super
rich until I turn it off, and restart. I bet the computer is messing with
the advance. I will have to take care of that issue soon. Thanks Mike.




"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4302622B.92D81425@sympatico.ca...
> It also controls the timing advance via a knock sensor and any other
> electric/vacuum modules like the fast idle kick up if you have an auto
> or AC.
>
> Basically if the carb is unplugged, it has gone into 'limp home' mode
> with the timing clamped down.
>
> When you do the 'nutter' the timing jumps about 15 degrees with the
> ignition module running things like it is 'supposed' to do.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Rusted wrote:
>>
>> On a 83 CJ with the 258 what does the computer control besides the
>> stepper
>> motor on the back of the carter carb? My stepper is not even connected,
>> what is the nutter bypass going to change? Also attempt #2 at getting
>> the
>> MC2100 carb is going to happen soon.

 

I have gone 4+ years with no stepper and it seems to run ok. But that could
explain why occasionally when I first start up the Jeep it will run super
rich until I turn it off, and restart. I bet the computer is messing with
the advance. I will have to take care of that issue soon. Thanks Mike.




"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4302622B.92D81425@sympatico.ca...
> It also controls the timing advance via a knock sensor and any other
> electric/vacuum modules like the fast idle kick up if you have an auto
> or AC.
>
> Basically if the carb is unplugged, it has gone into 'limp home' mode
> with the timing clamped down.
>
> When you do the 'nutter' the timing jumps about 15 degrees with the
> ignition module running things like it is 'supposed' to do.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Rusted wrote:
>>
>> On a 83 CJ with the 258 what does the computer control besides the
>> stepper
>> motor on the back of the carter carb? My stepper is not even connected,
>> what is the nutter bypass going to change? Also attempt #2 at getting
>> the
>> MC2100 carb is going to happen soon.

 

I have gone 4+ years with no stepper and it seems to run ok. But that could
explain why occasionally when I first start up the Jeep it will run super
rich until I turn it off, and restart. I bet the computer is messing with
the advance. I will have to take care of that issue soon. Thanks Mike.




"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4302622B.92D81425@sympatico.ca...
> It also controls the timing advance via a knock sensor and any other
> electric/vacuum modules like the fast idle kick up if you have an auto
> or AC.
>
> Basically if the carb is unplugged, it has gone into 'limp home' mode
> with the timing clamped down.
>
> When you do the 'nutter' the timing jumps about 15 degrees with the
> ignition module running things like it is 'supposed' to do.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Rusted wrote:
>>
>> On a 83 CJ with the 258 what does the computer control besides the
>> stepper
>> motor on the back of the carter carb? My stepper is not even connected,
>> what is the nutter bypass going to change? Also attempt #2 at getting
>> the
>> MC2100 carb is going to happen soon.

 

The stepper controls mixture as commanded by the MCU. If your stepper
is disconnected, the MCU can't make it rich.

Are you sure it's rich, and does it happen when started hot or cold?



On Tue, 16 Aug 2005 17:05:52 -0600, "Rusted" <noEmail@please.com>
wrote:

>I have gone 4+ years with no stepper and it seems to run ok. But that could
>explain why occasionally when I first start up the Jeep it will run super
>rich until I turn it off, and restart. I bet the computer is messing with
>the advance. I will have to take care of that issue soon. Thanks Mike.
>
>
>
>
>"Mike Romain" <romainm@sympatico.ca> wrote in message
>news:4302622B.92D81425@sympatico.ca...
>> It also controls the timing advance via a knock sensor and any other
>> electric/vacuum modules like the fast idle kick up if you have an auto
>> or AC.
>>
>> Basically if the carb is unplugged, it has gone into 'limp home' mode
>> with the timing clamped down.
>>
>> When you do the 'nutter' the timing jumps about 15 degrees with the
>> ignition module running things like it is 'supposed' to do.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>>
>> Rusted wrote:
>>>
>>> On a 83 CJ with the 258 what does the computer control besides the
>>> stepper
>>> motor on the back of the carter carb? My stepper is not even connected,
>>> what is the nutter bypass going to change? Also attempt #2 at getting
>>> the
>>> MC2100 carb is going to happen soon.
>
>

 

The stepper controls mixture as commanded by the MCU. If your stepper
is disconnected, the MCU can't make it rich.

Are you sure it's rich, and does it happen when started hot or cold?



On Tue, 16 Aug 2005 17:05:52 -0600, "Rusted" <noEmail@please.com>
wrote:

>I have gone 4+ years with no stepper and it seems to run ok. But that could
>explain why occasionally when I first start up the Jeep it will run super
>rich until I turn it off, and restart. I bet the computer is messing with
>the advance. I will have to take care of that issue soon. Thanks Mike.
>
>
>
>
>"Mike Romain" <romainm@sympatico.ca> wrote in message
>news:4302622B.92D81425@sympatico.ca...
>> It also controls the timing advance via a knock sensor and any other
>> electric/vacuum modules like the fast idle kick up if you have an auto
>> or AC.
>>
>> Basically if the carb is unplugged, it has gone into 'limp home' mode
>> with the timing clamped down.
>>
>> When you do the 'nutter' the timing jumps about 15 degrees with the
>> ignition module running things like it is 'supposed' to do.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>>
>> Rusted wrote:
>>>
>>> On a 83 CJ with the 258 what does the computer control besides the
>>> stepper
>>> motor on the back of the carter carb? My stepper is not even connected,
>>> what is the nutter bypass going to change? Also attempt #2 at getting
>>> the
>>> MC2100 carb is going to happen soon.
>
>

 

The stepper controls mixture as commanded by the MCU. If your stepper
is disconnected, the MCU can't make it rich.

Are you sure it's rich, and does it happen when started hot or cold?



On Tue, 16 Aug 2005 17:05:52 -0600, "Rusted" <noEmail@please.com>
wrote:

>I have gone 4+ years with no stepper and it seems to run ok. But that could
>explain why occasionally when I first start up the Jeep it will run super
>rich until I turn it off, and restart. I bet the computer is messing with
>the advance. I will have to take care of that issue soon. Thanks Mike.
>
>
>
>
>"Mike Romain" <romainm@sympatico.ca> wrote in message
>news:4302622B.92D81425@sympatico.ca...
>> It also controls the timing advance via a knock sensor and any other
>> electric/vacuum modules like the fast idle kick up if you have an auto
>> or AC.
>>
>> Basically if the carb is unplugged, it has gone into 'limp home' mode
>> with the timing clamped down.
>>
>> When you do the 'nutter' the timing jumps about 15 degrees with the
>> ignition module running things like it is 'supposed' to do.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>>
>> Rusted wrote:
>>>
>>> On a 83 CJ with the 258 what does the computer control besides the
>>> stepper
>>> motor on the back of the carter carb? My stepper is not even connected,
>>> what is the nutter bypass going to change? Also attempt #2 at getting
>>> the
>>> MC2100 carb is going to happen soon.
>
>

 

The stepper controls mixture as commanded by the MCU. If your stepper
is disconnected, the MCU can't make it rich.

Are you sure it's rich, and does it happen when started hot or cold?



On Tue, 16 Aug 2005 17:05:52 -0600, "Rusted" <noEmail@please.com>
wrote:

>I have gone 4+ years with no stepper and it seems to run ok. But that could
>explain why occasionally when I first start up the Jeep it will run super
>rich until I turn it off, and restart. I bet the computer is messing with
>the advance. I will have to take care of that issue soon. Thanks Mike.
>
>
>
>
>"Mike Romain" <romainm@sympatico.ca> wrote in message
>news:4302622B.92D81425@sympatico.ca...
>> It also controls the timing advance via a knock sensor and any other
>> electric/vacuum modules like the fast idle kick up if you have an auto
>> or AC.
>>
>> Basically if the carb is unplugged, it has gone into 'limp home' mode
>> with the timing clamped down.
>>
>> When you do the 'nutter' the timing jumps about 15 degrees with the
>> ignition module running things like it is 'supposed' to do.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>>
>> Rusted wrote:
>>>
>>> On a 83 CJ with the 258 what does the computer control besides the
>>> stepper
>>> motor on the back of the carter carb? My stepper is not even connected,
>>> what is the nutter bypass going to change? Also attempt #2 at getting
>>> the
>>> MC2100 carb is going to happen soon.
>
>

 

Always when started cold. It is very rich during that time. It seems to
run fine at low RPM, but by the time I get down the street and am still in
first gear it will hardly run. As long as the RPM's are below 2000ish it is
ok. If I turn it off, and back on problem is fixed.. This happens more in
the winter than in the summer, I was trying to blame it on a stuck carb.
Anyways I will nutter it and put on a MC2100 and see if the problem goes
away.


"bllsht" <nospam@invaliddot.net> wrote in message
news:e0f5g19qthaa8e9481dq8mn9r71a7600u0@4ax.com...
> The stepper controls mixture as commanded by the MCU. If your stepper
> is disconnected, the MCU can't make it rich.
>
> Are you sure it's rich, and does it happen when started hot or cold?
>
>
>
> On Tue, 16 Aug 2005 17:05:52 -0600, "Rusted" <noEmail@please.com>
> wrote:
>
>>I have gone 4+ years with no stepper and it seems to run ok. But that
>>could
>>explain why occasionally when I first start up the Jeep it will run super
>>rich until I turn it off, and restart. I bet the computer is messing
>>with
>>the advance. I will have to take care of that issue soon. Thanks Mike.
>>
>>
>>
>>
>>"Mike Romain" <romainm@sympatico.ca> wrote in message
>>news:4302622B.92D81425@sympatico.ca...
>>> It also controls the timing advance via a knock sensor and any other
>>> electric/vacuum modules like the fast idle kick up if you have an auto
>>> or AC.
>>>
>>> Basically if the carb is unplugged, it has gone into 'limp home' mode
>>> with the timing clamped down.
>>>
>>> When you do the 'nutter' the timing jumps about 15 degrees with the
>>> ignition module running things like it is 'supposed' to do.
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>>
>>> Rusted wrote:
>>>>
>>>> On a 83 CJ with the 258 what does the computer control besides the
>>>> stepper
>>>> motor on the back of the carter carb? My stepper is not even
>>>> connected,
>>>> what is the nutter bypass going to change? Also attempt #2 at getting
>>>> the
>>>> MC2100 carb is going to happen soon.
>>
>>

 

Always when started cold. It is very rich during that time. It seems to
run fine at low RPM, but by the time I get down the street and am still in
first gear it will hardly run. As long as the RPM's are below 2000ish it is
ok. If I turn it off, and back on problem is fixed.. This happens more in
the winter than in the summer, I was trying to blame it on a stuck carb.
Anyways I will nutter it and put on a MC2100 and see if the problem goes
away.


"bllsht" <nospam@invaliddot.net> wrote in message
news:e0f5g19qthaa8e9481dq8mn9r71a7600u0@4ax.com...
> The stepper controls mixture as commanded by the MCU. If your stepper
> is disconnected, the MCU can't make it rich.
>
> Are you sure it's rich, and does it happen when started hot or cold?
>
>
>
> On Tue, 16 Aug 2005 17:05:52 -0600, "Rusted" <noEmail@please.com>
> wrote:
>
>>I have gone 4+ years with no stepper and it seems to run ok. But that
>>could
>>explain why occasionally when I first start up the Jeep it will run super
>>rich until I turn it off, and restart. I bet the computer is messing
>>with
>>the advance. I will have to take care of that issue soon. Thanks Mike.
>>
>>
>>
>>
>>"Mike Romain" <romainm@sympatico.ca> wrote in message
>>news:4302622B.92D81425@sympatico.ca...
>>> It also controls the timing advance via a knock sensor and any other
>>> electric/vacuum modules like the fast idle kick up if you have an auto
>>> or AC.
>>>
>>> Basically if the carb is unplugged, it has gone into 'limp home' mode
>>> with the timing clamped down.
>>>
>>> When you do the 'nutter' the timing jumps about 15 degrees with the
>>> ignition module running things like it is 'supposed' to do.
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>>
>>> Rusted wrote:
>>>>
>>>> On a 83 CJ with the 258 what does the computer control besides the
>>>> stepper
>>>> motor on the back of the carter carb? My stepper is not even
>>>> connected,
>>>> what is the nutter bypass going to change? Also attempt #2 at getting
>>>> the
>>>> MC2100 carb is going to happen soon.
>>
>>

 

Always when started cold. It is very rich during that time. It seems to
run fine at low RPM, but by the time I get down the street and am still in
first gear it will hardly run. As long as the RPM's are below 2000ish it is
ok. If I turn it off, and back on problem is fixed.. This happens more in
the winter than in the summer, I was trying to blame it on a stuck carb.
Anyways I will nutter it and put on a MC2100 and see if the problem goes
away.


"bllsht" <nospam@invaliddot.net> wrote in message
news:e0f5g19qthaa8e9481dq8mn9r71a7600u0@4ax.com...
> The stepper controls mixture as commanded by the MCU. If your stepper
> is disconnected, the MCU can't make it rich.
>
> Are you sure it's rich, and does it happen when started hot or cold?
>
>
>
> On Tue, 16 Aug 2005 17:05:52 -0600, "Rusted" <noEmail@please.com>
> wrote:
>
>>I have gone 4+ years with no stepper and it seems to run ok. But that
>>could
>>explain why occasionally when I first start up the Jeep it will run super
>>rich until I turn it off, and restart. I bet the computer is messing
>>with
>>the advance. I will have to take care of that issue soon. Thanks Mike.
>>
>>
>>
>>
>>"Mike Romain" <romainm@sympatico.ca> wrote in message
>>news:4302622B.92D81425@sympatico.ca...
>>> It also controls the timing advance via a knock sensor and any other
>>> electric/vacuum modules like the fast idle kick up if you have an auto
>>> or AC.
>>>
>>> Basically if the carb is unplugged, it has gone into 'limp home' mode
>>> with the timing clamped down.
>>>
>>> When you do the 'nutter' the timing jumps about 15 degrees with the
>>> ignition module running things like it is 'supposed' to do.
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>>
>>> Rusted wrote:
>>>>
>>>> On a 83 CJ with the 258 what does the computer control besides the
>>>> stepper
>>>> motor on the back of the carter carb? My stepper is not even
>>>> connected,
>>>> what is the nutter bypass going to change? Also attempt #2 at getting
>>>> the
>>>> MC2100 carb is going to happen soon.
>>
>>