Re: weber conversion/nutter bypass problem
 

Ouch, what did you do to the vacuum lines?

If the CTO is dead or not there and you have a dirty air filter on the
charcoal canister, it will act like it ran out of gas. Let it sit for a
while then it will run again for a short time. Opening the gas cap is a
quick fix for that.

The computer is still there, it still controls the tach on a YJ.

I don't know about the auto. Some 'might' have a vacuum shift module on
them.

I would likely be looking at the distributor cap or something else if it
ran good for a while.

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

Rich Pierson wrote:
>
> Did the weber conversion and nutter bypass last week or so. While on the
> way home the other nite my son pulled up to a stop sign and it died. This
> was during the storm/hurricane we had here. Jeep starts up fine but as soon
> as you put it into D or R it dies. Checked the vac lines and found one
> loose one, no change except for the idle back up to ~800. We strapped it to
> a friends house and it has been sitting for 3 days and with scheduling we
> have not been able to spend more than about 20 min on it, going to look at
> it today. The only thing we did different on the conversion was not to use
> the CTO which he is saving up for now.
> Does the auto tranny in a 89YJ interact with the motor at all in an
> electrical sense or vacumn sense.
> Computer is out as I understand it with the nutter bypass or is it ??
>
> RichP

Re: weber conversion/nutter bypass problem
 

My 84 did the same thing.... when it warmed up it went into the limp home
mode.... that was after the nutter bypass and webber carb.... mine wound up
being the intake manifold sucking air after it heated up.... my exhaust
manifold was warped and would not let the intake sit flush.... so I
installed a Borla header and now it runs great....

DGann

"Rich Pierson" <fist@ptd.net> wrote in message
news:Xns93FDAB26EC296fistptdnet@204.186.201.17...
> What I did with the vac lines was use the one on the valve cover side as
> 'ported' and the one on the base of the carb as 'manifold', then I ran
> the ported and manifold ones as diagramed on the sprynet site. Used some
> T and Y fittings but esentially did not use the cto at all. It has been
> fine for over a week or so, ran great till this happened. His only
> complaint was low end power was great, high end power no improvement
> As for idle, it will sit there an idle till the cows come home, put it in
> D or R and it dies. He's over at his friends looking at it now, if he has
> no luck then I guess I'll pack up my XJ and head on over. I want him to
> get it back here so we can replace the radiator that just came in on fri
> and get that out of the way.
>
> Mike Romain <romainm@sympatico.ca> wrote in
> news:3F6DE51C.526E420D@sympatico.ca:
>
> > Ouch, what did you do to the vacuum lines?
> >
> > If the CTO is dead or not there and you have a dirty air filter on the
> > charcoal canister, it will act like it ran out of gas. Let it sit for
> > a while then it will run again for a short time. Opening the gas cap
> > is a quick fix for that.
> >
> > The computer is still there, it still controls the tach on a YJ.
> >
> > I don't know about the auto. Some 'might' have a vacuum shift module
> > on them.
> >
> > I would likely be looking at the distributor cap or something else if
> > it ran good for a while.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Rich Pierson wrote:
> >>
> >> Did the weber conversion and nutter bypass last week or so. While on
> >> the way home the other nite my son pulled up to a stop sign and it
> >> died. This was during the storm/hurricane we had here. Jeep starts up
> >> fine but as soon as you put it into D or R it dies. Checked the vac
> >> lines and found one loose one, no change except for the idle back up
> >> to ~800. We strapped it to a friends house and it has been sitting
> >> for 3 days and with scheduling we have not been able to spend more
> >> than about 20 min on it, going to look at it today. The only thing we
> >> did different on the conversion was not to use the CTO which he is
> >> saving up for now. Does the auto tranny in a 89YJ interact with the
> >> motor at all in an electrical sense or vacumn sense.
> >> Computer is out as I understand it with the nutter bypass or is it ??
> >>
> >> RichP
> >
>

Re: weber conversion/nutter bypass problem
 

My 84 did the same thing.... when it warmed up it went into the limp home
mode.... that was after the nutter bypass and webber carb.... mine wound up
being the intake manifold sucking air after it heated up.... my exhaust
manifold was warped and would not let the intake sit flush.... so I
installed a Borla header and now it runs great....

DGann

"Rich Pierson" <fist@ptd.net> wrote in message
news:Xns93FDAB26EC296fistptdnet@204.186.201.17...
> What I did with the vac lines was use the one on the valve cover side as
> 'ported' and the one on the base of the carb as 'manifold', then I ran
> the ported and manifold ones as diagramed on the sprynet site. Used some
> T and Y fittings but esentially did not use the cto at all. It has been
> fine for over a week or so, ran great till this happened. His only
> complaint was low end power was great, high end power no improvement
> As for idle, it will sit there an idle till the cows come home, put it in
> D or R and it dies. He's over at his friends looking at it now, if he has
> no luck then I guess I'll pack up my XJ and head on over. I want him to
> get it back here so we can replace the radiator that just came in on fri
> and get that out of the way.
>
> Mike Romain <romainm@sympatico.ca> wrote in
> news:3F6DE51C.526E420D@sympatico.ca:
>
> > Ouch, what did you do to the vacuum lines?
> >
> > If the CTO is dead or not there and you have a dirty air filter on the
> > charcoal canister, it will act like it ran out of gas. Let it sit for
> > a while then it will run again for a short time. Opening the gas cap
> > is a quick fix for that.
> >
> > The computer is still there, it still controls the tach on a YJ.
> >
> > I don't know about the auto. Some 'might' have a vacuum shift module
> > on them.
> >
> > I would likely be looking at the distributor cap or something else if
> > it ran good for a while.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Rich Pierson wrote:
> >>
> >> Did the weber conversion and nutter bypass last week or so. While on
> >> the way home the other nite my son pulled up to a stop sign and it
> >> died. This was during the storm/hurricane we had here. Jeep starts up
> >> fine but as soon as you put it into D or R it dies. Checked the vac
> >> lines and found one loose one, no change except for the idle back up
> >> to ~800. We strapped it to a friends house and it has been sitting
> >> for 3 days and with scheduling we have not been able to spend more
> >> than about 20 min on it, going to look at it today. The only thing we
> >> did different on the conversion was not to use the CTO which he is
> >> saving up for now. Does the auto tranny in a 89YJ interact with the
> >> motor at all in an electrical sense or vacumn sense.
> >> Computer is out as I understand it with the nutter bypass or is it ??
> >>
> >> RichP
> >
>