Hi Mike,
This is what I've got. At idle I can suck into the tube connected to the
advance. The timing light shows that it only is able to jump up 2 to 4
degrees, but no more. Should there be more? There is virtually no
difference in the advance with or without the vacuum line hooked up when I
open the throttle up full. Should I disassemble the distributor / advance
and see if somethings binding up? The advance I think was replaced less
than a year ago.

--
Thanks Always !!!
Paul '75 CJ5 258
Vail, CO.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F847ED1.FBC21189@sympatico.ca...
> 12 deg is up there, but within the limits. I run mine at 9.
>
> You have two kinds of advance, one is a set of weights that slowly
> climbs up, the other is vacuum that gives an instant jump.
>
> I have mine set to ported vacuum, so the advance moves instantly with
> the gas pedal.
>
> I can 'hear' it snap to full advance inside the distributor when I give
> it a quick shot of gas.
>
> My distributor has the linkage going to the vacuum pot out in the open
> on the front side of the distributor, I guess yours has a cover on it?
>
> If you disconnect the vacuum line at the distributor with the engine
> running does anything happen? If no, then it is a ported vacuum like
> mine that does nothing at idle. Mine comes off the nipple on the valve
> cover side of the carb up near the top.
>
> You also should be able to have it idling and be able to suck on the
> vacuum line and see the timing mark move with the light on it.
>
> The mark also should move under the light way differently with the
> vacuum line off. It will climb slow with the line of and just snap to
> attention with a shot from the gas pedal with the line on.
>
> Mike
>
> Paul Brogren wrote:
> >
> > I've put a timing light on it. The timing is set at 12 deg. btdc. As I
> > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > anymore. As far as looking at the linkage when it's running, I don't
know
> > if I can? The distributor doesn't have any visible linkage or clear
parts.
> > The advance is white plastic. The linkage I've looked at is under the
rotor
> > and within this white plastic housing. I'll bring a mirror out and see
if
> > there is anything I can see from undernearth the distributor itself
maybe
> > just above where it mounts down to the block.
> >
> > Thanks
> > Paul
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:3F846E64.5C4B0478@sympatico.ca...
> > > You really need a timing light to tell what is going on for sure, but
a
> > > visual on the advance linkage outside the bottom of the distributor
cap
> > > will give you an idea.
> > >
> > > Depending on your plumbing, the vacuum advance will do one of two
> > > things. First it will do nothing at idle and advance as you give it
gas
> > > Or, it will go full advance at idle and back off when you give it gas
to
> > > a point, then slowly climb back up.
> > >
> > > Looking at/ watching the linkage with it running will tell you.
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > Paul Brogren wrote:
> > > >
> > > > Hi All,
> > > >
> > > > I think the vacuum advance on my distributor is not working. I
pulled
> > the
> > > > cap/rotor and the cover under these off. I sucked on the vacuum
line
> > and
> > > > checked the linkage on the advance. It does move. I'm wondering if
my
> > > > suction line off the carb is not suppling enough suction? or could
the
> > > > advance still be bad even though the linkage moves?
> > > >
> > > > '75 CJ5 258 1BBl carter
> > > >
> > > > Thanks again,
> > > >
> > > > Paul

 

Hi Mike,
This is what I've got. At idle I can suck into the tube connected to the
advance. The timing light shows that it only is able to jump up 2 to 4
degrees, but no more. Should there be more? There is virtually no
difference in the advance with or without the vacuum line hooked up when I
open the throttle up full. Should I disassemble the distributor / advance
and see if somethings binding up? The advance I think was replaced less
than a year ago.

--
Thanks Always !!!
Paul '75 CJ5 258
Vail, CO.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F847ED1.FBC21189@sympatico.ca...
> 12 deg is up there, but within the limits. I run mine at 9.
>
> You have two kinds of advance, one is a set of weights that slowly
> climbs up, the other is vacuum that gives an instant jump.
>
> I have mine set to ported vacuum, so the advance moves instantly with
> the gas pedal.
>
> I can 'hear' it snap to full advance inside the distributor when I give
> it a quick shot of gas.
>
> My distributor has the linkage going to the vacuum pot out in the open
> on the front side of the distributor, I guess yours has a cover on it?
>
> If you disconnect the vacuum line at the distributor with the engine
> running does anything happen? If no, then it is a ported vacuum like
> mine that does nothing at idle. Mine comes off the nipple on the valve
> cover side of the carb up near the top.
>
> You also should be able to have it idling and be able to suck on the
> vacuum line and see the timing mark move with the light on it.
>
> The mark also should move under the light way differently with the
> vacuum line off. It will climb slow with the line of and just snap to
> attention with a shot from the gas pedal with the line on.
>
> Mike
>
> Paul Brogren wrote:
> >
> > I've put a timing light on it. The timing is set at 12 deg. btdc. As I
> > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > anymore. As far as looking at the linkage when it's running, I don't
know
> > if I can? The distributor doesn't have any visible linkage or clear
parts.
> > The advance is white plastic. The linkage I've looked at is under the
rotor
> > and within this white plastic housing. I'll bring a mirror out and see
if
> > there is anything I can see from undernearth the distributor itself
maybe
> > just above where it mounts down to the block.
> >
> > Thanks
> > Paul
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:3F846E64.5C4B0478@sympatico.ca...
> > > You really need a timing light to tell what is going on for sure, but
a
> > > visual on the advance linkage outside the bottom of the distributor
cap
> > > will give you an idea.
> > >
> > > Depending on your plumbing, the vacuum advance will do one of two
> > > things. First it will do nothing at idle and advance as you give it
gas
> > > Or, it will go full advance at idle and back off when you give it gas
to
> > > a point, then slowly climb back up.
> > >
> > > Looking at/ watching the linkage with it running will tell you.
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > Paul Brogren wrote:
> > > >
> > > > Hi All,
> > > >
> > > > I think the vacuum advance on my distributor is not working. I
pulled
> > the
> > > > cap/rotor and the cover under these off. I sucked on the vacuum
line
> > and
> > > > checked the linkage on the advance. It does move. I'm wondering if
my
> > > > suction line off the carb is not suppling enough suction? or could
the
> > > > advance still be bad even though the linkage moves?
> > > >
> > > > '75 CJ5 258 1BBl carter
> > > >
> > > > Thanks again,
> > > >
> > > > Paul

 

Hi Mike,
This is what I've got. At idle I can suck into the tube connected to the
advance. The timing light shows that it only is able to jump up 2 to 4
degrees, but no more. Should there be more? There is virtually no
difference in the advance with or without the vacuum line hooked up when I
open the throttle up full. Should I disassemble the distributor / advance
and see if somethings binding up? The advance I think was replaced less
than a year ago.

--
Thanks Always !!!
Paul '75 CJ5 258
Vail, CO.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F847ED1.FBC21189@sympatico.ca...
> 12 deg is up there, but within the limits. I run mine at 9.
>
> You have two kinds of advance, one is a set of weights that slowly
> climbs up, the other is vacuum that gives an instant jump.
>
> I have mine set to ported vacuum, so the advance moves instantly with
> the gas pedal.
>
> I can 'hear' it snap to full advance inside the distributor when I give
> it a quick shot of gas.
>
> My distributor has the linkage going to the vacuum pot out in the open
> on the front side of the distributor, I guess yours has a cover on it?
>
> If you disconnect the vacuum line at the distributor with the engine
> running does anything happen? If no, then it is a ported vacuum like
> mine that does nothing at idle. Mine comes off the nipple on the valve
> cover side of the carb up near the top.
>
> You also should be able to have it idling and be able to suck on the
> vacuum line and see the timing mark move with the light on it.
>
> The mark also should move under the light way differently with the
> vacuum line off. It will climb slow with the line of and just snap to
> attention with a shot from the gas pedal with the line on.
>
> Mike
>
> Paul Brogren wrote:
> >
> > I've put a timing light on it. The timing is set at 12 deg. btdc. As I
> > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > anymore. As far as looking at the linkage when it's running, I don't
know
> > if I can? The distributor doesn't have any visible linkage or clear
parts.
> > The advance is white plastic. The linkage I've looked at is under the
rotor
> > and within this white plastic housing. I'll bring a mirror out and see
if
> > there is anything I can see from undernearth the distributor itself
maybe
> > just above where it mounts down to the block.
> >
> > Thanks
> > Paul
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:3F846E64.5C4B0478@sympatico.ca...
> > > You really need a timing light to tell what is going on for sure, but
a
> > > visual on the advance linkage outside the bottom of the distributor
cap
> > > will give you an idea.
> > >
> > > Depending on your plumbing, the vacuum advance will do one of two
> > > things. First it will do nothing at idle and advance as you give it
gas
> > > Or, it will go full advance at idle and back off when you give it gas
to
> > > a point, then slowly climb back up.
> > >
> > > Looking at/ watching the linkage with it running will tell you.
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > Paul Brogren wrote:
> > > >
> > > > Hi All,
> > > >
> > > > I think the vacuum advance on my distributor is not working. I
pulled
> > the
> > > > cap/rotor and the cover under these off. I sucked on the vacuum
line
> > and
> > > > checked the linkage on the advance. It does move. I'm wondering if
my
> > > > suction line off the carb is not suppling enough suction? or could
the
> > > > advance still be bad even though the linkage moves?
> > > >
> > > > '75 CJ5 258 1BBl carter
> > > >
> > > > Thanks again,
> > > >
> > > > Paul

 

It sounds to me like something is jamming it up.

If you take off the rotor, there should be a foam piece down the center
of the distributor shaft that is supposed to be oiled. I would oil it
and maybe pull the pad out to get oil down the shaft. I would then hand
work the advance or put the rotor back on and twist it back and forth to
get the oil down the tube and loosen it. The rotor will turn the
advance plate.

The distributor shaft is two pieces, a solid core goes down to the
timing gear and an outside tube holds the timing advance and electronic
pickup/points and rotor.

If this tube get sticky on the center shaft, it can/will stop the vacuum
advance. The centripetal weights will still have enough power to
advance it for a while longer, but they too will stop working if the
outside tube seizes solid on the distributor shaft.

Bet that is why the advance was replaced, the old one likely didn't work
also.

It is dark out right now, but I can set up my timing light on mine
tomorrow and suck on the vacuum to see if I can suck hard enough to have
an effect, but I bet I can.

If you want to go oil up yours and try again before I do this, post
back.

Mike

Paul Brogren wrote:
>
> Hi Mike,
> This is what I've got. At idle I can suck into the tube connected to the
> advance. The timing light shows that it only is able to jump up 2 to 4
> degrees, but no more. Should there be more? There is virtually no
> difference in the advance with or without the vacuum line hooked up when I
> open the throttle up full. Should I disassemble the distributor / advance
> and see if somethings binding up? The advance I think was replaced less
> than a year ago.
>
> --
> Thanks Always !!!
> Paul '75 CJ5 258
> Vail, CO.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:3F847ED1.FBC21189@sympatico.ca...
> > 12 deg is up there, but within the limits. I run mine at 9.
> >
> > You have two kinds of advance, one is a set of weights that slowly
> > climbs up, the other is vacuum that gives an instant jump.
> >
> > I have mine set to ported vacuum, so the advance moves instantly with
> > the gas pedal.
> >
> > I can 'hear' it snap to full advance inside the distributor when I give
> > it a quick shot of gas.
> >
> > My distributor has the linkage going to the vacuum pot out in the open
> > on the front side of the distributor, I guess yours has a cover on it?
> >
> > If you disconnect the vacuum line at the distributor with the engine
> > running does anything happen? If no, then it is a ported vacuum like
> > mine that does nothing at idle. Mine comes off the nipple on the valve
> > cover side of the carb up near the top.
> >
> > You also should be able to have it idling and be able to suck on the
> > vacuum line and see the timing mark move with the light on it.
> >
> > The mark also should move under the light way differently with the
> > vacuum line off. It will climb slow with the line of and just snap to
> > attention with a shot from the gas pedal with the line on.
> >
> > Mike
> >
> > Paul Brogren wrote:
> > >
> > > I've put a timing light on it. The timing is set at 12 deg. btdc. As I
> > > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > > anymore. As far as looking at the linkage when it's running, I don't
> know
> > > if I can? The distributor doesn't have any visible linkage or clear
> parts.
> > > The advance is white plastic. The linkage I've looked at is under the
> rotor
> > > and within this white plastic housing. I'll bring a mirror out and see
> if
> > > there is anything I can see from undernearth the distributor itself
> maybe
> > > just above where it mounts down to the block.
> > >
> > > Thanks
> > > Paul
> > > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > > news:3F846E64.5C4B0478@sympatico.ca...
> > > > You really need a timing light to tell what is going on for sure, but
> a
> > > > visual on the advance linkage outside the bottom of the distributor
> cap
> > > > will give you an idea.
> > > >
> > > > Depending on your plumbing, the vacuum advance will do one of two
> > > > things. First it will do nothing at idle and advance as you give it
> gas
> > > > Or, it will go full advance at idle and back off when you give it gas
> to
> > > > a point, then slowly climb back up.
> > > >
> > > > Looking at/ watching the linkage with it running will tell you.
> > > >
> > > > Mike
> > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > > 88 Cherokee 235 BFG AT's
> > > >
> > > > Paul Brogren wrote:
> > > > >
> > > > > Hi All,
> > > > >
> > > > > I think the vacuum advance on my distributor is not working. I
> pulled
> > > the
> > > > > cap/rotor and the cover under these off. I sucked on the vacuum
> line
> > > and
> > > > > checked the linkage on the advance. It does move. I'm wondering if
> my
> > > > > suction line off the carb is not suppling enough suction? or could
> the
> > > > > advance still be bad even though the linkage moves?
> > > > >
> > > > > '75 CJ5 258 1BBl carter
> > > > >
> > > > > Thanks again,
> > > > >
> > > > > Paul

 

It sounds to me like something is jamming it up.

If you take off the rotor, there should be a foam piece down the center
of the distributor shaft that is supposed to be oiled. I would oil it
and maybe pull the pad out to get oil down the shaft. I would then hand
work the advance or put the rotor back on and twist it back and forth to
get the oil down the tube and loosen it. The rotor will turn the
advance plate.

The distributor shaft is two pieces, a solid core goes down to the
timing gear and an outside tube holds the timing advance and electronic
pickup/points and rotor.

If this tube get sticky on the center shaft, it can/will stop the vacuum
advance. The centripetal weights will still have enough power to
advance it for a while longer, but they too will stop working if the
outside tube seizes solid on the distributor shaft.

Bet that is why the advance was replaced, the old one likely didn't work
also.

It is dark out right now, but I can set up my timing light on mine
tomorrow and suck on the vacuum to see if I can suck hard enough to have
an effect, but I bet I can.

If you want to go oil up yours and try again before I do this, post
back.

Mike

Paul Brogren wrote:
>
> Hi Mike,
> This is what I've got. At idle I can suck into the tube connected to the
> advance. The timing light shows that it only is able to jump up 2 to 4
> degrees, but no more. Should there be more? There is virtually no
> difference in the advance with or without the vacuum line hooked up when I
> open the throttle up full. Should I disassemble the distributor / advance
> and see if somethings binding up? The advance I think was replaced less
> than a year ago.
>
> --
> Thanks Always !!!
> Paul '75 CJ5 258
> Vail, CO.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:3F847ED1.FBC21189@sympatico.ca...
> > 12 deg is up there, but within the limits. I run mine at 9.
> >
> > You have two kinds of advance, one is a set of weights that slowly
> > climbs up, the other is vacuum that gives an instant jump.
> >
> > I have mine set to ported vacuum, so the advance moves instantly with
> > the gas pedal.
> >
> > I can 'hear' it snap to full advance inside the distributor when I give
> > it a quick shot of gas.
> >
> > My distributor has the linkage going to the vacuum pot out in the open
> > on the front side of the distributor, I guess yours has a cover on it?
> >
> > If you disconnect the vacuum line at the distributor with the engine
> > running does anything happen? If no, then it is a ported vacuum like
> > mine that does nothing at idle. Mine comes off the nipple on the valve
> > cover side of the carb up near the top.
> >
> > You also should be able to have it idling and be able to suck on the
> > vacuum line and see the timing mark move with the light on it.
> >
> > The mark also should move under the light way differently with the
> > vacuum line off. It will climb slow with the line of and just snap to
> > attention with a shot from the gas pedal with the line on.
> >
> > Mike
> >
> > Paul Brogren wrote:
> > >
> > > I've put a timing light on it. The timing is set at 12 deg. btdc. As I
> > > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > > anymore. As far as looking at the linkage when it's running, I don't
> know
> > > if I can? The distributor doesn't have any visible linkage or clear
> parts.
> > > The advance is white plastic. The linkage I've looked at is under the
> rotor
> > > and within this white plastic housing. I'll bring a mirror out and see
> if
> > > there is anything I can see from undernearth the distributor itself
> maybe
> > > just above where it mounts down to the block.
> > >
> > > Thanks
> > > Paul
> > > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > > news:3F846E64.5C4B0478@sympatico.ca...
> > > > You really need a timing light to tell what is going on for sure, but
> a
> > > > visual on the advance linkage outside the bottom of the distributor
> cap
> > > > will give you an idea.
> > > >
> > > > Depending on your plumbing, the vacuum advance will do one of two
> > > > things. First it will do nothing at idle and advance as you give it
> gas
> > > > Or, it will go full advance at idle and back off when you give it gas
> to
> > > > a point, then slowly climb back up.
> > > >
> > > > Looking at/ watching the linkage with it running will tell you.
> > > >
> > > > Mike
> > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > > 88 Cherokee 235 BFG AT's
> > > >
> > > > Paul Brogren wrote:
> > > > >
> > > > > Hi All,
> > > > >
> > > > > I think the vacuum advance on my distributor is not working. I
> pulled
> > > the
> > > > > cap/rotor and the cover under these off. I sucked on the vacuum
> line
> > > and
> > > > > checked the linkage on the advance. It does move. I'm wondering if
> my
> > > > > suction line off the carb is not suppling enough suction? or could
> the
> > > > > advance still be bad even though the linkage moves?
> > > > >
> > > > > '75 CJ5 258 1BBl carter
> > > > >
> > > > > Thanks again,
> > > > >
> > > > > Paul

 

It sounds to me like something is jamming it up.

If you take off the rotor, there should be a foam piece down the center
of the distributor shaft that is supposed to be oiled. I would oil it
and maybe pull the pad out to get oil down the shaft. I would then hand
work the advance or put the rotor back on and twist it back and forth to
get the oil down the tube and loosen it. The rotor will turn the
advance plate.

The distributor shaft is two pieces, a solid core goes down to the
timing gear and an outside tube holds the timing advance and electronic
pickup/points and rotor.

If this tube get sticky on the center shaft, it can/will stop the vacuum
advance. The centripetal weights will still have enough power to
advance it for a while longer, but they too will stop working if the
outside tube seizes solid on the distributor shaft.

Bet that is why the advance was replaced, the old one likely didn't work
also.

It is dark out right now, but I can set up my timing light on mine
tomorrow and suck on the vacuum to see if I can suck hard enough to have
an effect, but I bet I can.

If you want to go oil up yours and try again before I do this, post
back.

Mike

Paul Brogren wrote:
>
> Hi Mike,
> This is what I've got. At idle I can suck into the tube connected to the
> advance. The timing light shows that it only is able to jump up 2 to 4
> degrees, but no more. Should there be more? There is virtually no
> difference in the advance with or without the vacuum line hooked up when I
> open the throttle up full. Should I disassemble the distributor / advance
> and see if somethings binding up? The advance I think was replaced less
> than a year ago.
>
> --
> Thanks Always !!!
> Paul '75 CJ5 258
> Vail, CO.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:3F847ED1.FBC21189@sympatico.ca...
> > 12 deg is up there, but within the limits. I run mine at 9.
> >
> > You have two kinds of advance, one is a set of weights that slowly
> > climbs up, the other is vacuum that gives an instant jump.
> >
> > I have mine set to ported vacuum, so the advance moves instantly with
> > the gas pedal.
> >
> > I can 'hear' it snap to full advance inside the distributor when I give
> > it a quick shot of gas.
> >
> > My distributor has the linkage going to the vacuum pot out in the open
> > on the front side of the distributor, I guess yours has a cover on it?
> >
> > If you disconnect the vacuum line at the distributor with the engine
> > running does anything happen? If no, then it is a ported vacuum like
> > mine that does nothing at idle. Mine comes off the nipple on the valve
> > cover side of the carb up near the top.
> >
> > You also should be able to have it idling and be able to suck on the
> > vacuum line and see the timing mark move with the light on it.
> >
> > The mark also should move under the light way differently with the
> > vacuum line off. It will climb slow with the line of and just snap to
> > attention with a shot from the gas pedal with the line on.
> >
> > Mike
> >
> > Paul Brogren wrote:
> > >
> > > I've put a timing light on it. The timing is set at 12 deg. btdc. As I
> > > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > > anymore. As far as looking at the linkage when it's running, I don't
> know
> > > if I can? The distributor doesn't have any visible linkage or clear
> parts.
> > > The advance is white plastic. The linkage I've looked at is under the
> rotor
> > > and within this white plastic housing. I'll bring a mirror out and see
> if
> > > there is anything I can see from undernearth the distributor itself
> maybe
> > > just above where it mounts down to the block.
> > >
> > > Thanks
> > > Paul
> > > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > > news:3F846E64.5C4B0478@sympatico.ca...
> > > > You really need a timing light to tell what is going on for sure, but
> a
> > > > visual on the advance linkage outside the bottom of the distributor
> cap
> > > > will give you an idea.
> > > >
> > > > Depending on your plumbing, the vacuum advance will do one of two
> > > > things. First it will do nothing at idle and advance as you give it
> gas
> > > > Or, it will go full advance at idle and back off when you give it gas
> to
> > > > a point, then slowly climb back up.
> > > >
> > > > Looking at/ watching the linkage with it running will tell you.
> > > >
> > > > Mike
> > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > > 88 Cherokee 235 BFG AT's
> > > >
> > > > Paul Brogren wrote:
> > > > >
> > > > > Hi All,
> > > > >
> > > > > I think the vacuum advance on my distributor is not working. I
> pulled
> > > the
> > > > > cap/rotor and the cover under these off. I sucked on the vacuum
> line
> > > and
> > > > > checked the linkage on the advance. It does move. I'm wondering if
> my
> > > > > suction line off the carb is not suppling enough suction? or could
> the
> > > > > advance still be bad even though the linkage moves?
> > > > >
> > > > > '75 CJ5 258 1BBl carter
> > > > >
> > > > > Thanks again,
> > > > >
> > > > > Paul

 

Sounds good Mike. What I've done prior to reading the lastest post was:
- I removed and cleaned up the distributor.
- Removed and cleaned up the exterior of the sensor and advance module.
- Oiled up that inner shaft and manually operated the summing bar and
linkage.

I re-timed the motor and will drive it in to work in the morning. I'll post
you from work. I'll bet your right with that inner distributor shaft. I've
overlooked it many times not realizing it's importance.

Thanks again Mike!!!
Paul
--
Thanks Always !!!
Paul '75 CJ5 258
Vail, CO.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F849D14.4470BF0A@sympatico.ca...
> It sounds to me like something is jamming it up.
>
> If you take off the rotor, there should be a foam piece down the center
> of the distributor shaft that is supposed to be oiled. I would oil it
> and maybe pull the pad out to get oil down the shaft. I would then hand
> work the advance or put the rotor back on and twist it back and forth to
> get the oil down the tube and loosen it. The rotor will turn the
> advance plate.
>
> The distributor shaft is two pieces, a solid core goes down to the
> timing gear and an outside tube holds the timing advance and electronic
> pickup/points and rotor.
>
> If this tube get sticky on the center shaft, it can/will stop the vacuum
> advance. The centripetal weights will still have enough power to
> advance it for a while longer, but they too will stop working if the
> outside tube seizes solid on the distributor shaft.
>
> Bet that is why the advance was replaced, the old one likely didn't work
> also.
>
> It is dark out right now, but I can set up my timing light on mine
> tomorrow and suck on the vacuum to see if I can suck hard enough to have
> an effect, but I bet I can.
>
> If you want to go oil up yours and try again before I do this, post
> back.
>
> Mike
>
> Paul Brogren wrote:
> >
> > Hi Mike,
> > This is what I've got. At idle I can suck into the tube connected to
the
> > advance. The timing light shows that it only is able to jump up 2 to 4
> > degrees, but no more. Should there be more? There is virtually no
> > difference in the advance with or without the vacuum line hooked up when
I
> > open the throttle up full. Should I disassemble the distributor /
advance
> > and see if somethings binding up? The advance I think was replaced less
> > than a year ago.
> >
> > --
> > Thanks Always !!!
> > Paul '75 CJ5 258
> > Vail, CO.
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:3F847ED1.FBC21189@sympatico.ca...
> > > 12 deg is up there, but within the limits. I run mine at 9.
> > >
> > > You have two kinds of advance, one is a set of weights that slowly
> > > climbs up, the other is vacuum that gives an instant jump.
> > >
> > > I have mine set to ported vacuum, so the advance moves instantly with
> > > the gas pedal.
> > >
> > > I can 'hear' it snap to full advance inside the distributor when I
give
> > > it a quick shot of gas.
> > >
> > > My distributor has the linkage going to the vacuum pot out in the open
> > > on the front side of the distributor, I guess yours has a cover on it?
> > >
> > > If you disconnect the vacuum line at the distributor with the engine
> > > running does anything happen? If no, then it is a ported vacuum like
> > > mine that does nothing at idle. Mine comes off the nipple on the
valve
> > > cover side of the carb up near the top.
> > >
> > > You also should be able to have it idling and be able to suck on the
> > > vacuum line and see the timing mark move with the light on it.
> > >
> > > The mark also should move under the light way differently with the
> > > vacuum line off. It will climb slow with the line of and just snap to
> > > attention with a shot from the gas pedal with the line on.
> > >
> > > Mike
> > >
> > > Paul Brogren wrote:
> > > >
> > > > I've put a timing light on it. The timing is set at 12 deg. btdc.
As I
> > > > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > > > anymore. As far as looking at the linkage when it's running, I
don't
> > know
> > > > if I can? The distributor doesn't have any visible linkage or clear
> > parts.
> > > > The advance is white plastic. The linkage I've looked at is under
the
> > rotor
> > > > and within this white plastic housing. I'll bring a mirror out and
see
> > if
> > > > there is anything I can see from undernearth the distributor itself
> > maybe
> > > > just above where it mounts down to the block.
> > > >
> > > > Thanks
> > > > Paul
> > > > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > > > news:3F846E64.5C4B0478@sympatico.ca...
> > > > > You really need a timing light to tell what is going on for sure,
but
> > a
> > > > > visual on the advance linkage outside the bottom of the
distributor
> > cap
> > > > > will give you an idea.
> > > > >
> > > > > Depending on your plumbing, the vacuum advance will do one of two
> > > > > things. First it will do nothing at idle and advance as you give
it
> > gas
> > > > > Or, it will go full advance at idle and back off when you give it
gas
> > to
> > > > > a point, then slowly climb back up.
> > > > >
> > > > > Looking at/ watching the linkage with it running will tell you.
> > > > >
> > > > > Mike
> > > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > > > 88 Cherokee 235 BFG AT's
> > > > >
> > > > > Paul Brogren wrote:
> > > > > >
> > > > > > Hi All,
> > > > > >
> > > > > > I think the vacuum advance on my distributor is not working. I
> > pulled
> > > > the
> > > > > > cap/rotor and the cover under these off. I sucked on the vacuum
> > line
> > > > and
> > > > > > checked the linkage on the advance. It does move. I'm
wondering if
> > my
> > > > > > suction line off the carb is not suppling enough suction? or
could
> > the
> > > > > > advance still be bad even though the linkage moves?
> > > > > >
> > > > > > '75 CJ5 258 1BBl carter
> > > > > >
> > > > > > Thanks again,
> > > > > >
> > > > > > Paul

 

Sounds good Mike. What I've done prior to reading the lastest post was:
- I removed and cleaned up the distributor.
- Removed and cleaned up the exterior of the sensor and advance module.
- Oiled up that inner shaft and manually operated the summing bar and
linkage.

I re-timed the motor and will drive it in to work in the morning. I'll post
you from work. I'll bet your right with that inner distributor shaft. I've
overlooked it many times not realizing it's importance.

Thanks again Mike!!!
Paul
--
Thanks Always !!!
Paul '75 CJ5 258
Vail, CO.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F849D14.4470BF0A@sympatico.ca...
> It sounds to me like something is jamming it up.
>
> If you take off the rotor, there should be a foam piece down the center
> of the distributor shaft that is supposed to be oiled. I would oil it
> and maybe pull the pad out to get oil down the shaft. I would then hand
> work the advance or put the rotor back on and twist it back and forth to
> get the oil down the tube and loosen it. The rotor will turn the
> advance plate.
>
> The distributor shaft is two pieces, a solid core goes down to the
> timing gear and an outside tube holds the timing advance and electronic
> pickup/points and rotor.
>
> If this tube get sticky on the center shaft, it can/will stop the vacuum
> advance. The centripetal weights will still have enough power to
> advance it for a while longer, but they too will stop working if the
> outside tube seizes solid on the distributor shaft.
>
> Bet that is why the advance was replaced, the old one likely didn't work
> also.
>
> It is dark out right now, but I can set up my timing light on mine
> tomorrow and suck on the vacuum to see if I can suck hard enough to have
> an effect, but I bet I can.
>
> If you want to go oil up yours and try again before I do this, post
> back.
>
> Mike
>
> Paul Brogren wrote:
> >
> > Hi Mike,
> > This is what I've got. At idle I can suck into the tube connected to
the
> > advance. The timing light shows that it only is able to jump up 2 to 4
> > degrees, but no more. Should there be more? There is virtually no
> > difference in the advance with or without the vacuum line hooked up when
I
> > open the throttle up full. Should I disassemble the distributor /
advance
> > and see if somethings binding up? The advance I think was replaced less
> > than a year ago.
> >
> > --
> > Thanks Always !!!
> > Paul '75 CJ5 258
> > Vail, CO.
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:3F847ED1.FBC21189@sympatico.ca...
> > > 12 deg is up there, but within the limits. I run mine at 9.
> > >
> > > You have two kinds of advance, one is a set of weights that slowly
> > > climbs up, the other is vacuum that gives an instant jump.
> > >
> > > I have mine set to ported vacuum, so the advance moves instantly with
> > > the gas pedal.
> > >
> > > I can 'hear' it snap to full advance inside the distributor when I
give
> > > it a quick shot of gas.
> > >
> > > My distributor has the linkage going to the vacuum pot out in the open
> > > on the front side of the distributor, I guess yours has a cover on it?
> > >
> > > If you disconnect the vacuum line at the distributor with the engine
> > > running does anything happen? If no, then it is a ported vacuum like
> > > mine that does nothing at idle. Mine comes off the nipple on the
valve
> > > cover side of the carb up near the top.
> > >
> > > You also should be able to have it idling and be able to suck on the
> > > vacuum line and see the timing mark move with the light on it.
> > >
> > > The mark also should move under the light way differently with the
> > > vacuum line off. It will climb slow with the line of and just snap to
> > > attention with a shot from the gas pedal with the line on.
> > >
> > > Mike
> > >
> > > Paul Brogren wrote:
> > > >
> > > > I've put a timing light on it. The timing is set at 12 deg. btdc.
As I
> > > > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > > > anymore. As far as looking at the linkage when it's running, I
don't
> > know
> > > > if I can? The distributor doesn't have any visible linkage or clear
> > parts.
> > > > The advance is white plastic. The linkage I've looked at is under
the
> > rotor
> > > > and within this white plastic housing. I'll bring a mirror out and
see
> > if
> > > > there is anything I can see from undernearth the distributor itself
> > maybe
> > > > just above where it mounts down to the block.
> > > >
> > > > Thanks
> > > > Paul
> > > > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > > > news:3F846E64.5C4B0478@sympatico.ca...
> > > > > You really need a timing light to tell what is going on for sure,
but
> > a
> > > > > visual on the advance linkage outside the bottom of the
distributor
> > cap
> > > > > will give you an idea.
> > > > >
> > > > > Depending on your plumbing, the vacuum advance will do one of two
> > > > > things. First it will do nothing at idle and advance as you give
it
> > gas
> > > > > Or, it will go full advance at idle and back off when you give it
gas
> > to
> > > > > a point, then slowly climb back up.
> > > > >
> > > > > Looking at/ watching the linkage with it running will tell you.
> > > > >
> > > > > Mike
> > > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > > > 88 Cherokee 235 BFG AT's
> > > > >
> > > > > Paul Brogren wrote:
> > > > > >
> > > > > > Hi All,
> > > > > >
> > > > > > I think the vacuum advance on my distributor is not working. I
> > pulled
> > > > the
> > > > > > cap/rotor and the cover under these off. I sucked on the vacuum
> > line
> > > > and
> > > > > > checked the linkage on the advance. It does move. I'm
wondering if
> > my
> > > > > > suction line off the carb is not suppling enough suction? or
could
> > the
> > > > > > advance still be bad even though the linkage moves?
> > > > > >
> > > > > > '75 CJ5 258 1BBl carter
> > > > > >
> > > > > > Thanks again,
> > > > > >
> > > > > > Paul

 

Sounds good Mike. What I've done prior to reading the lastest post was:
- I removed and cleaned up the distributor.
- Removed and cleaned up the exterior of the sensor and advance module.
- Oiled up that inner shaft and manually operated the summing bar and
linkage.

I re-timed the motor and will drive it in to work in the morning. I'll post
you from work. I'll bet your right with that inner distributor shaft. I've
overlooked it many times not realizing it's importance.

Thanks again Mike!!!
Paul
--
Thanks Always !!!
Paul '75 CJ5 258
Vail, CO.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F849D14.4470BF0A@sympatico.ca...
> It sounds to me like something is jamming it up.
>
> If you take off the rotor, there should be a foam piece down the center
> of the distributor shaft that is supposed to be oiled. I would oil it
> and maybe pull the pad out to get oil down the shaft. I would then hand
> work the advance or put the rotor back on and twist it back and forth to
> get the oil down the tube and loosen it. The rotor will turn the
> advance plate.
>
> The distributor shaft is two pieces, a solid core goes down to the
> timing gear and an outside tube holds the timing advance and electronic
> pickup/points and rotor.
>
> If this tube get sticky on the center shaft, it can/will stop the vacuum
> advance. The centripetal weights will still have enough power to
> advance it for a while longer, but they too will stop working if the
> outside tube seizes solid on the distributor shaft.
>
> Bet that is why the advance was replaced, the old one likely didn't work
> also.
>
> It is dark out right now, but I can set up my timing light on mine
> tomorrow and suck on the vacuum to see if I can suck hard enough to have
> an effect, but I bet I can.
>
> If you want to go oil up yours and try again before I do this, post
> back.
>
> Mike
>
> Paul Brogren wrote:
> >
> > Hi Mike,
> > This is what I've got. At idle I can suck into the tube connected to
the
> > advance. The timing light shows that it only is able to jump up 2 to 4
> > degrees, but no more. Should there be more? There is virtually no
> > difference in the advance with or without the vacuum line hooked up when
I
> > open the throttle up full. Should I disassemble the distributor /
advance
> > and see if somethings binding up? The advance I think was replaced less
> > than a year ago.
> >
> > --
> > Thanks Always !!!
> > Paul '75 CJ5 258
> > Vail, CO.
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:3F847ED1.FBC21189@sympatico.ca...
> > > 12 deg is up there, but within the limits. I run mine at 9.
> > >
> > > You have two kinds of advance, one is a set of weights that slowly
> > > climbs up, the other is vacuum that gives an instant jump.
> > >
> > > I have mine set to ported vacuum, so the advance moves instantly with
> > > the gas pedal.
> > >
> > > I can 'hear' it snap to full advance inside the distributor when I
give
> > > it a quick shot of gas.
> > >
> > > My distributor has the linkage going to the vacuum pot out in the open
> > > on the front side of the distributor, I guess yours has a cover on it?
> > >
> > > If you disconnect the vacuum line at the distributor with the engine
> > > running does anything happen? If no, then it is a ported vacuum like
> > > mine that does nothing at idle. Mine comes off the nipple on the
valve
> > > cover side of the carb up near the top.
> > >
> > > You also should be able to have it idling and be able to suck on the
> > > vacuum line and see the timing mark move with the light on it.
> > >
> > > The mark also should move under the light way differently with the
> > > vacuum line off. It will climb slow with the line of and just snap to
> > > attention with a shot from the gas pedal with the line on.
> > >
> > > Mike
> > >
> > > Paul Brogren wrote:
> > > >
> > > > I've put a timing light on it. The timing is set at 12 deg. btdc.
As I
> > > > give it gas, the climbs 14, 15 on up until I can't even see the mark
> > > > anymore. As far as looking at the linkage when it's running, I
don't
> > know
> > > > if I can? The distributor doesn't have any visible linkage or clear
> > parts.
> > > > The advance is white plastic. The linkage I've looked at is under
the
> > rotor
> > > > and within this white plastic housing. I'll bring a mirror out and
see
> > if
> > > > there is anything I can see from undernearth the distributor itself
> > maybe
> > > > just above where it mounts down to the block.
> > > >
> > > > Thanks
> > > > Paul
> > > > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > > > news:3F846E64.5C4B0478@sympatico.ca...
> > > > > You really need a timing light to tell what is going on for sure,
but
> > a
> > > > > visual on the advance linkage outside the bottom of the
distributor
> > cap
> > > > > will give you an idea.
> > > > >
> > > > > Depending on your plumbing, the vacuum advance will do one of two
> > > > > things. First it will do nothing at idle and advance as you give
it
> > gas
> > > > > Or, it will go full advance at idle and back off when you give it
gas
> > to
> > > > > a point, then slowly climb back up.
> > > > >
> > > > > Looking at/ watching the linkage with it running will tell you.
> > > > >
> > > > > Mike
> > > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > > > 88 Cherokee 235 BFG AT's
> > > > >
> > > > > Paul Brogren wrote:
> > > > > >
> > > > > > Hi All,
> > > > > >
> > > > > > I think the vacuum advance on my distributor is not working. I
> > pulled
> > > > the
> > > > > > cap/rotor and the cover under these off. I sucked on the vacuum
> > line
> > > > and
> > > > > > checked the linkage on the advance. It does move. I'm
wondering if
> > my
> > > > > > suction line off the carb is not suppling enough suction? or
could
> > the
> > > > > > advance still be bad even though the linkage moves?
> > > > > >
> > > > > > '75 CJ5 258 1BBl carter
> > > > > >
> > > > > > Thanks again,
> > > > > >
> > > > > > Paul