fuel mileage drop problem solved!
08-13-2006, 10:47 AM
#51
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
I set my timing at 650 rpm.
I 'think' it is one 'step' from full jam on the pins. I need to look at
mine so I will have look at where it sits. I will try to do that today,
but I am not moving well due to a change in drugs so I will have to see
what the pain level is. (got smucked up in a car accident a couple
years back)
The pins 'don't' move linearly or easily, they move on a 'stepper
motor'. You have to rock them to get them to go to the next step.
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)
bobvonbob wrote:
>
> ahhh - i see... yes that makes sense. any advice on how to find the
> proper position if there is no indication on the stepper motor shaft? i
> dont think the thing will even move if i was to hook up the computer,
> the shaft is so stiff.
> another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> but then after reading some posts on this list i reset the timing to
> 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> in power at higher rpms, but there are so many variables i'll have to
> sort it all out tomorrow when i reset the carb gaskets...
> but what rpms should i set the timing at?
> cheers,
> bennett
I 'think' it is one 'step' from full jam on the pins. I need to look at
mine so I will have look at where it sits. I will try to do that today,
but I am not moving well due to a change in drugs so I will have to see
what the pain level is. (got smucked up in a car accident a couple
years back)
The pins 'don't' move linearly or easily, they move on a 'stepper
motor'. You have to rock them to get them to go to the next step.
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)
bobvonbob wrote:
>
> ahhh - i see... yes that makes sense. any advice on how to find the
> proper position if there is no indication on the stepper motor shaft? i
> dont think the thing will even move if i was to hook up the computer,
> the shaft is so stiff.
> another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> but then after reading some posts on this list i reset the timing to
> 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> in power at higher rpms, but there are so many variables i'll have to
> sort it all out tomorrow when i reset the carb gaskets...
> but what rpms should i set the timing at?
> cheers,
> bennett
08-13-2006, 10:47 AM
#52
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
I set my timing at 650 rpm.
I 'think' it is one 'step' from full jam on the pins. I need to look at
mine so I will have look at where it sits. I will try to do that today,
but I am not moving well due to a change in drugs so I will have to see
what the pain level is. (got smucked up in a car accident a couple
years back)
The pins 'don't' move linearly or easily, they move on a 'stepper
motor'. You have to rock them to get them to go to the next step.
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)
bobvonbob wrote:
>
> ahhh - i see... yes that makes sense. any advice on how to find the
> proper position if there is no indication on the stepper motor shaft? i
> dont think the thing will even move if i was to hook up the computer,
> the shaft is so stiff.
> another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> but then after reading some posts on this list i reset the timing to
> 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> in power at higher rpms, but there are so many variables i'll have to
> sort it all out tomorrow when i reset the carb gaskets...
> but what rpms should i set the timing at?
> cheers,
> bennett
I 'think' it is one 'step' from full jam on the pins. I need to look at
mine so I will have look at where it sits. I will try to do that today,
but I am not moving well due to a change in drugs so I will have to see
what the pain level is. (got smucked up in a car accident a couple
years back)
The pins 'don't' move linearly or easily, they move on a 'stepper
motor'. You have to rock them to get them to go to the next step.
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)
bobvonbob wrote:
>
> ahhh - i see... yes that makes sense. any advice on how to find the
> proper position if there is no indication on the stepper motor shaft? i
> dont think the thing will even move if i was to hook up the computer,
> the shaft is so stiff.
> another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> but then after reading some posts on this list i reset the timing to
> 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> in power at higher rpms, but there are so many variables i'll have to
> sort it all out tomorrow when i reset the carb gaskets...
> but what rpms should i set the timing at?
> cheers,
> bennett
08-13-2006, 10:47 AM
#53
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
I set my timing at 650 rpm.
I 'think' it is one 'step' from full jam on the pins. I need to look at
mine so I will have look at where it sits. I will try to do that today,
but I am not moving well due to a change in drugs so I will have to see
what the pain level is. (got smucked up in a car accident a couple
years back)
The pins 'don't' move linearly or easily, they move on a 'stepper
motor'. You have to rock them to get them to go to the next step.
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)
bobvonbob wrote:
>
> ahhh - i see... yes that makes sense. any advice on how to find the
> proper position if there is no indication on the stepper motor shaft? i
> dont think the thing will even move if i was to hook up the computer,
> the shaft is so stiff.
> another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> but then after reading some posts on this list i reset the timing to
> 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> in power at higher rpms, but there are so many variables i'll have to
> sort it all out tomorrow when i reset the carb gaskets...
> but what rpms should i set the timing at?
> cheers,
> bennett
I 'think' it is one 'step' from full jam on the pins. I need to look at
mine so I will have look at where it sits. I will try to do that today,
but I am not moving well due to a change in drugs so I will have to see
what the pain level is. (got smucked up in a car accident a couple
years back)
The pins 'don't' move linearly or easily, they move on a 'stepper
motor'. You have to rock them to get them to go to the next step.
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)
bobvonbob wrote:
>
> ahhh - i see... yes that makes sense. any advice on how to find the
> proper position if there is no indication on the stepper motor shaft? i
> dont think the thing will even move if i was to hook up the computer,
> the shaft is so stiff.
> another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> but then after reading some posts on this list i reset the timing to
> 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> in power at higher rpms, but there are so many variables i'll have to
> sort it all out tomorrow when i reset the carb gaskets...
> but what rpms should i set the timing at?
> cheers,
> bennett
08-13-2006, 04:20 PM
#54
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
Ok, I just checked mine and thought about what I did to it last time.
It's been a while....
As far as I know or have seen anyway, the computer won't bottom out the
pins the same distance you can by hand.
Most I have seen are one or two steps out from full physical depth when
the computer puts them rich and I ran/run mine actually 2 steps out
which was as far as my system would put it so I tried it there. It has
worked fine there with lots of top end power. The plugs show as
'normal' burn. I have done several of my friend's carbs also and leave
the pins as far as the system will put them usually. Maybe it's
different factory emissions that makes the difference or a different
year computer.
I wanted to try and burn that 15% ethanol mix crap they are forcing on
us, so I went full rich by hand. My gas mileage dropped to 10 or 12
mpg.... and it still wouldn't run on that crappy mix. Back to the 2
steps out and it purrs. 2 steps makes 1/4 turn difference on the idle
mix screws to get the nice stable 600 rpm.
I also tried rich because my engine was running hot. Made no difference
so went back.
Anyhow, I just tried mine and I can move the pins by rocking them with a
mini screwdriver on mine.
I have taken mine and many other's who I have done this to in for
emissions and we all pass with great numbers so the setup must be damn
close to perfect or as close as those guys that only know how to read
scanners can come....
On the ASM 2525 test and I got 589 NOx and 16 ppm HC and 0.11% CO. That
is with no cat converter too!
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)
Mike Romain wrote:
>
> I set my timing at 650 rpm.
>
> I 'think' it is one 'step' from full jam on the pins. I need to look at
> mine so I will have look at where it sits. I will try to do that today,
> but I am not moving well due to a change in drugs so I will have to see
> what the pain level is. (got smucked up in a car accident a couple
> years back)
>
> The pins 'don't' move linearly or easily, they move on a 'stepper
> motor'. You have to rock them to get them to go to the next step.
>
> 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)
>
> bobvonbob wrote:
> >
> > ahhh - i see... yes that makes sense. any advice on how to find the
> > proper position if there is no indication on the stepper motor shaft? i
> > dont think the thing will even move if i was to hook up the computer,
> > the shaft is so stiff.
> > another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> > but then after reading some posts on this list i reset the timing to
> > 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> > in power at higher rpms, but there are so many variables i'll have to
> > sort it all out tomorrow when i reset the carb gaskets...
> > but what rpms should i set the timing at?
> > cheers,
> > bennett
It's been a while....
As far as I know or have seen anyway, the computer won't bottom out the
pins the same distance you can by hand.
Most I have seen are one or two steps out from full physical depth when
the computer puts them rich and I ran/run mine actually 2 steps out
which was as far as my system would put it so I tried it there. It has
worked fine there with lots of top end power. The plugs show as
'normal' burn. I have done several of my friend's carbs also and leave
the pins as far as the system will put them usually. Maybe it's
different factory emissions that makes the difference or a different
year computer.
I wanted to try and burn that 15% ethanol mix crap they are forcing on
us, so I went full rich by hand. My gas mileage dropped to 10 or 12
mpg.... and it still wouldn't run on that crappy mix. Back to the 2
steps out and it purrs. 2 steps makes 1/4 turn difference on the idle
mix screws to get the nice stable 600 rpm.
I also tried rich because my engine was running hot. Made no difference
so went back.
Anyhow, I just tried mine and I can move the pins by rocking them with a
mini screwdriver on mine.
I have taken mine and many other's who I have done this to in for
emissions and we all pass with great numbers so the setup must be damn
close to perfect or as close as those guys that only know how to read
scanners can come....
On the ASM 2525 test and I got 589 NOx and 16 ppm HC and 0.11% CO. That
is with no cat converter too!
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)
Mike Romain wrote:
>
> I set my timing at 650 rpm.
>
> I 'think' it is one 'step' from full jam on the pins. I need to look at
> mine so I will have look at where it sits. I will try to do that today,
> but I am not moving well due to a change in drugs so I will have to see
> what the pain level is. (got smucked up in a car accident a couple
> years back)
>
> The pins 'don't' move linearly or easily, they move on a 'stepper
> motor'. You have to rock them to get them to go to the next step.
>
> 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)
>
> bobvonbob wrote:
> >
> > ahhh - i see... yes that makes sense. any advice on how to find the
> > proper position if there is no indication on the stepper motor shaft? i
> > dont think the thing will even move if i was to hook up the computer,
> > the shaft is so stiff.
> > another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> > but then after reading some posts on this list i reset the timing to
> > 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> > in power at higher rpms, but there are so many variables i'll have to
> > sort it all out tomorrow when i reset the carb gaskets...
> > but what rpms should i set the timing at?
> > cheers,
> > bennett
08-13-2006, 04:20 PM
#55
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
Ok, I just checked mine and thought about what I did to it last time.
It's been a while....
As far as I know or have seen anyway, the computer won't bottom out the
pins the same distance you can by hand.
Most I have seen are one or two steps out from full physical depth when
the computer puts them rich and I ran/run mine actually 2 steps out
which was as far as my system would put it so I tried it there. It has
worked fine there with lots of top end power. The plugs show as
'normal' burn. I have done several of my friend's carbs also and leave
the pins as far as the system will put them usually. Maybe it's
different factory emissions that makes the difference or a different
year computer.
I wanted to try and burn that 15% ethanol mix crap they are forcing on
us, so I went full rich by hand. My gas mileage dropped to 10 or 12
mpg.... and it still wouldn't run on that crappy mix. Back to the 2
steps out and it purrs. 2 steps makes 1/4 turn difference on the idle
mix screws to get the nice stable 600 rpm.
I also tried rich because my engine was running hot. Made no difference
so went back.
Anyhow, I just tried mine and I can move the pins by rocking them with a
mini screwdriver on mine.
I have taken mine and many other's who I have done this to in for
emissions and we all pass with great numbers so the setup must be damn
close to perfect or as close as those guys that only know how to read
scanners can come....
On the ASM 2525 test and I got 589 NOx and 16 ppm HC and 0.11% CO. That
is with no cat converter too!
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)
Mike Romain wrote:
>
> I set my timing at 650 rpm.
>
> I 'think' it is one 'step' from full jam on the pins. I need to look at
> mine so I will have look at where it sits. I will try to do that today,
> but I am not moving well due to a change in drugs so I will have to see
> what the pain level is. (got smucked up in a car accident a couple
> years back)
>
> The pins 'don't' move linearly or easily, they move on a 'stepper
> motor'. You have to rock them to get them to go to the next step.
>
> 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)
>
> bobvonbob wrote:
> >
> > ahhh - i see... yes that makes sense. any advice on how to find the
> > proper position if there is no indication on the stepper motor shaft? i
> > dont think the thing will even move if i was to hook up the computer,
> > the shaft is so stiff.
> > another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> > but then after reading some posts on this list i reset the timing to
> > 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> > in power at higher rpms, but there are so many variables i'll have to
> > sort it all out tomorrow when i reset the carb gaskets...
> > but what rpms should i set the timing at?
> > cheers,
> > bennett
It's been a while....
As far as I know or have seen anyway, the computer won't bottom out the
pins the same distance you can by hand.
Most I have seen are one or two steps out from full physical depth when
the computer puts them rich and I ran/run mine actually 2 steps out
which was as far as my system would put it so I tried it there. It has
worked fine there with lots of top end power. The plugs show as
'normal' burn. I have done several of my friend's carbs also and leave
the pins as far as the system will put them usually. Maybe it's
different factory emissions that makes the difference or a different
year computer.
I wanted to try and burn that 15% ethanol mix crap they are forcing on
us, so I went full rich by hand. My gas mileage dropped to 10 or 12
mpg.... and it still wouldn't run on that crappy mix. Back to the 2
steps out and it purrs. 2 steps makes 1/4 turn difference on the idle
mix screws to get the nice stable 600 rpm.
I also tried rich because my engine was running hot. Made no difference
so went back.
Anyhow, I just tried mine and I can move the pins by rocking them with a
mini screwdriver on mine.
I have taken mine and many other's who I have done this to in for
emissions and we all pass with great numbers so the setup must be damn
close to perfect or as close as those guys that only know how to read
scanners can come....
On the ASM 2525 test and I got 589 NOx and 16 ppm HC and 0.11% CO. That
is with no cat converter too!
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)
Mike Romain wrote:
>
> I set my timing at 650 rpm.
>
> I 'think' it is one 'step' from full jam on the pins. I need to look at
> mine so I will have look at where it sits. I will try to do that today,
> but I am not moving well due to a change in drugs so I will have to see
> what the pain level is. (got smucked up in a car accident a couple
> years back)
>
> The pins 'don't' move linearly or easily, they move on a 'stepper
> motor'. You have to rock them to get them to go to the next step.
>
> 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)
>
> bobvonbob wrote:
> >
> > ahhh - i see... yes that makes sense. any advice on how to find the
> > proper position if there is no indication on the stepper motor shaft? i
> > dont think the thing will even move if i was to hook up the computer,
> > the shaft is so stiff.
> > another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> > but then after reading some posts on this list i reset the timing to
> > 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> > in power at higher rpms, but there are so many variables i'll have to
> > sort it all out tomorrow when i reset the carb gaskets...
> > but what rpms should i set the timing at?
> > cheers,
> > bennett
08-13-2006, 04:20 PM
#56
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
Ok, I just checked mine and thought about what I did to it last time.
It's been a while....
As far as I know or have seen anyway, the computer won't bottom out the
pins the same distance you can by hand.
Most I have seen are one or two steps out from full physical depth when
the computer puts them rich and I ran/run mine actually 2 steps out
which was as far as my system would put it so I tried it there. It has
worked fine there with lots of top end power. The plugs show as
'normal' burn. I have done several of my friend's carbs also and leave
the pins as far as the system will put them usually. Maybe it's
different factory emissions that makes the difference or a different
year computer.
I wanted to try and burn that 15% ethanol mix crap they are forcing on
us, so I went full rich by hand. My gas mileage dropped to 10 or 12
mpg.... and it still wouldn't run on that crappy mix. Back to the 2
steps out and it purrs. 2 steps makes 1/4 turn difference on the idle
mix screws to get the nice stable 600 rpm.
I also tried rich because my engine was running hot. Made no difference
so went back.
Anyhow, I just tried mine and I can move the pins by rocking them with a
mini screwdriver on mine.
I have taken mine and many other's who I have done this to in for
emissions and we all pass with great numbers so the setup must be damn
close to perfect or as close as those guys that only know how to read
scanners can come....
On the ASM 2525 test and I got 589 NOx and 16 ppm HC and 0.11% CO. That
is with no cat converter too!
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)
Mike Romain wrote:
>
> I set my timing at 650 rpm.
>
> I 'think' it is one 'step' from full jam on the pins. I need to look at
> mine so I will have look at where it sits. I will try to do that today,
> but I am not moving well due to a change in drugs so I will have to see
> what the pain level is. (got smucked up in a car accident a couple
> years back)
>
> The pins 'don't' move linearly or easily, they move on a 'stepper
> motor'. You have to rock them to get them to go to the next step.
>
> 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)
>
> bobvonbob wrote:
> >
> > ahhh - i see... yes that makes sense. any advice on how to find the
> > proper position if there is no indication on the stepper motor shaft? i
> > dont think the thing will even move if i was to hook up the computer,
> > the shaft is so stiff.
> > another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> > but then after reading some posts on this list i reset the timing to
> > 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> > in power at higher rpms, but there are so many variables i'll have to
> > sort it all out tomorrow when i reset the carb gaskets...
> > but what rpms should i set the timing at?
> > cheers,
> > bennett
It's been a while....
As far as I know or have seen anyway, the computer won't bottom out the
pins the same distance you can by hand.
Most I have seen are one or two steps out from full physical depth when
the computer puts them rich and I ran/run mine actually 2 steps out
which was as far as my system would put it so I tried it there. It has
worked fine there with lots of top end power. The plugs show as
'normal' burn. I have done several of my friend's carbs also and leave
the pins as far as the system will put them usually. Maybe it's
different factory emissions that makes the difference or a different
year computer.
I wanted to try and burn that 15% ethanol mix crap they are forcing on
us, so I went full rich by hand. My gas mileage dropped to 10 or 12
mpg.... and it still wouldn't run on that crappy mix. Back to the 2
steps out and it purrs. 2 steps makes 1/4 turn difference on the idle
mix screws to get the nice stable 600 rpm.
I also tried rich because my engine was running hot. Made no difference
so went back.
Anyhow, I just tried mine and I can move the pins by rocking them with a
mini screwdriver on mine.
I have taken mine and many other's who I have done this to in for
emissions and we all pass with great numbers so the setup must be damn
close to perfect or as close as those guys that only know how to read
scanners can come....
On the ASM 2525 test and I got 589 NOx and 16 ppm HC and 0.11% CO. That
is with no cat converter too!
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)
Mike Romain wrote:
>
> I set my timing at 650 rpm.
>
> I 'think' it is one 'step' from full jam on the pins. I need to look at
> mine so I will have look at where it sits. I will try to do that today,
> but I am not moving well due to a change in drugs so I will have to see
> what the pain level is. (got smucked up in a car accident a couple
> years back)
>
> The pins 'don't' move linearly or easily, they move on a 'stepper
> motor'. You have to rock them to get them to go to the next step.
>
> 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)
>
> bobvonbob wrote:
> >
> > ahhh - i see... yes that makes sense. any advice on how to find the
> > proper position if there is no indication on the stepper motor shaft? i
> > dont think the thing will even move if i was to hook up the computer,
> > the shaft is so stiff.
> > another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> > but then after reading some posts on this list i reset the timing to
> > 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> > in power at higher rpms, but there are so many variables i'll have to
> > sort it all out tomorrow when i reset the carb gaskets...
> > but what rpms should i set the timing at?
> > cheers,
> > bennett
08-13-2006, 04:20 PM
#57
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
Ok, I just checked mine and thought about what I did to it last time.
It's been a while....
As far as I know or have seen anyway, the computer won't bottom out the
pins the same distance you can by hand.
Most I have seen are one or two steps out from full physical depth when
the computer puts them rich and I ran/run mine actually 2 steps out
which was as far as my system would put it so I tried it there. It has
worked fine there with lots of top end power. The plugs show as
'normal' burn. I have done several of my friend's carbs also and leave
the pins as far as the system will put them usually. Maybe it's
different factory emissions that makes the difference or a different
year computer.
I wanted to try and burn that 15% ethanol mix crap they are forcing on
us, so I went full rich by hand. My gas mileage dropped to 10 or 12
mpg.... and it still wouldn't run on that crappy mix. Back to the 2
steps out and it purrs. 2 steps makes 1/4 turn difference on the idle
mix screws to get the nice stable 600 rpm.
I also tried rich because my engine was running hot. Made no difference
so went back.
Anyhow, I just tried mine and I can move the pins by rocking them with a
mini screwdriver on mine.
I have taken mine and many other's who I have done this to in for
emissions and we all pass with great numbers so the setup must be damn
close to perfect or as close as those guys that only know how to read
scanners can come....
On the ASM 2525 test and I got 589 NOx and 16 ppm HC and 0.11% CO. That
is with no cat converter too!
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)
Mike Romain wrote:
>
> I set my timing at 650 rpm.
>
> I 'think' it is one 'step' from full jam on the pins. I need to look at
> mine so I will have look at where it sits. I will try to do that today,
> but I am not moving well due to a change in drugs so I will have to see
> what the pain level is. (got smucked up in a car accident a couple
> years back)
>
> The pins 'don't' move linearly or easily, they move on a 'stepper
> motor'. You have to rock them to get them to go to the next step.
>
> 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)
>
> bobvonbob wrote:
> >
> > ahhh - i see... yes that makes sense. any advice on how to find the
> > proper position if there is no indication on the stepper motor shaft? i
> > dont think the thing will even move if i was to hook up the computer,
> > the shaft is so stiff.
> > another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> > but then after reading some posts on this list i reset the timing to
> > 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> > in power at higher rpms, but there are so many variables i'll have to
> > sort it all out tomorrow when i reset the carb gaskets...
> > but what rpms should i set the timing at?
> > cheers,
> > bennett
It's been a while....
As far as I know or have seen anyway, the computer won't bottom out the
pins the same distance you can by hand.
Most I have seen are one or two steps out from full physical depth when
the computer puts them rich and I ran/run mine actually 2 steps out
which was as far as my system would put it so I tried it there. It has
worked fine there with lots of top end power. The plugs show as
'normal' burn. I have done several of my friend's carbs also and leave
the pins as far as the system will put them usually. Maybe it's
different factory emissions that makes the difference or a different
year computer.
I wanted to try and burn that 15% ethanol mix crap they are forcing on
us, so I went full rich by hand. My gas mileage dropped to 10 or 12
mpg.... and it still wouldn't run on that crappy mix. Back to the 2
steps out and it purrs. 2 steps makes 1/4 turn difference on the idle
mix screws to get the nice stable 600 rpm.
I also tried rich because my engine was running hot. Made no difference
so went back.
Anyhow, I just tried mine and I can move the pins by rocking them with a
mini screwdriver on mine.
I have taken mine and many other's who I have done this to in for
emissions and we all pass with great numbers so the setup must be damn
close to perfect or as close as those guys that only know how to read
scanners can come....
On the ASM 2525 test and I got 589 NOx and 16 ppm HC and 0.11% CO. That
is with no cat converter too!
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)
Mike Romain wrote:
>
> I set my timing at 650 rpm.
>
> I 'think' it is one 'step' from full jam on the pins. I need to look at
> mine so I will have look at where it sits. I will try to do that today,
> but I am not moving well due to a change in drugs so I will have to see
> what the pain level is. (got smucked up in a car accident a couple
> years back)
>
> The pins 'don't' move linearly or easily, they move on a 'stepper
> motor'. You have to rock them to get them to go to the next step.
>
> 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)
>
> bobvonbob wrote:
> >
> > ahhh - i see... yes that makes sense. any advice on how to find the
> > proper position if there is no indication on the stepper motor shaft? i
> > dont think the thing will even move if i was to hook up the computer,
> > the shaft is so stiff.
> > another question: i set my timing originally to 8-9d BTDC at 1600 rpm,
> > but then after reading some posts on this list i reset the timing to
> > 8-9d BTDC at 'idle' (approx 700rpm) - i have noticed somewhat of a drop
> > in power at higher rpms, but there are so many variables i'll have to
> > sort it all out tomorrow when i reset the carb gaskets...
> > but what rpms should i set the timing at?
> > cheers,
> > bennett
08-13-2006, 06:27 PM
#58
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
thanks mike. i assume you mean that you are moving the pins while the
motor is mounted to the carb... hence the small screwdriver... yes? i
will try this but my shaft is pretty damn stubborn so we'll see. i have
a feeling it hasnt really moved in years.
will be tearing the carb off and checking the gaskets so i will let you
know how it all works out.
cheers,
bennett
ps sorry to hear about your accident. a few years ago? hope its not too
bad.
motor is mounted to the carb... hence the small screwdriver... yes? i
will try this but my shaft is pretty damn stubborn so we'll see. i have
a feeling it hasnt really moved in years.
will be tearing the carb off and checking the gaskets so i will let you
know how it all works out.
cheers,
bennett
ps sorry to hear about your accident. a few years ago? hope its not too
bad.
08-13-2006, 06:27 PM
#59
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
thanks mike. i assume you mean that you are moving the pins while the
motor is mounted to the carb... hence the small screwdriver... yes? i
will try this but my shaft is pretty damn stubborn so we'll see. i have
a feeling it hasnt really moved in years.
will be tearing the carb off and checking the gaskets so i will let you
know how it all works out.
cheers,
bennett
ps sorry to hear about your accident. a few years ago? hope its not too
bad.
motor is mounted to the carb... hence the small screwdriver... yes? i
will try this but my shaft is pretty damn stubborn so we'll see. i have
a feeling it hasnt really moved in years.
will be tearing the carb off and checking the gaskets so i will let you
know how it all works out.
cheers,
bennett
ps sorry to hear about your accident. a few years ago? hope its not too
bad.
08-13-2006, 06:27 PM
#60
Guest
Posts: n/a
Re: fuel mileage drop problem solved!
thanks mike. i assume you mean that you are moving the pins while the
motor is mounted to the carb... hence the small screwdriver... yes? i
will try this but my shaft is pretty damn stubborn so we'll see. i have
a feeling it hasnt really moved in years.
will be tearing the carb off and checking the gaskets so i will let you
know how it all works out.
cheers,
bennett
ps sorry to hear about your accident. a few years ago? hope its not too
bad.
motor is mounted to the carb... hence the small screwdriver... yes? i
will try this but my shaft is pretty damn stubborn so we'll see. i have
a feeling it hasnt really moved in years.
will be tearing the carb off and checking the gaskets so i will let you
know how it all works out.
cheers,
bennett
ps sorry to hear about your accident. a few years ago? hope its not too
bad.
