emissions crap on an 89YJ
 

I have an 89YJ, 4.2L

I'm installing a carb from a 70's CJ and ditching the emissions
crap...question is, there are 2 vaccuum solenoids on the firewall above the
valve cover and 3 on the valve cover, what are these for and can I ditch
them too?

thanks

Re: emissions crap on an 89YJ
 

They are all garbage and you can keep the stock Weber-Carter BBD that's
on there too if you want and still toss the emissions computer.

To physically toss the computer, you have to wire the tach direct. Here
are the directions for killing the computer for a sweet 25%+ seat of the
pants power boost.

http://home.sprynet.com/~dale02/ignmods.htm

It can still pass emissions tuned manually. I kept the vacuum for the
PCV and canister (important), EGR, distributor and air filter flaps
working, all the rest is garbage.

If your stock carb is giving you fits, check this link to make it
purr....

http://www.off-road.com/jeep/tech/engine/carter.html

I don't see how you can use a 70's carb on it, they were 1 BBL, the
newer ones are 2 BBL so you would have to change the intake too.

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

Pi-eyed Piper wrote:
>
> I have an 89YJ, 4.2L
>
> I'm installing a carb from a 70's CJ and ditching the emissions
> crap...question is, there are 2 vaccuum solenoids on the firewall above the
> valve cover and 3 on the valve cover, what are these for and can I ditch
> them too?
>
> thanks

Re: emissions crap on an 89YJ
 

They are all garbage and you can keep the stock Weber-Carter BBD that's
on there too if you want and still toss the emissions computer.

To physically toss the computer, you have to wire the tach direct. Here
are the directions for killing the computer for a sweet 25%+ seat of the
pants power boost.

http://home.sprynet.com/~dale02/ignmods.htm

It can still pass emissions tuned manually. I kept the vacuum for the
PCV and canister (important), EGR, distributor and air filter flaps
working, all the rest is garbage.

If your stock carb is giving you fits, check this link to make it
purr....

http://www.off-road.com/jeep/tech/engine/carter.html

I don't see how you can use a 70's carb on it, they were 1 BBL, the
newer ones are 2 BBL so you would have to change the intake too.

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

Pi-eyed Piper wrote:
>
> I have an 89YJ, 4.2L
>
> I'm installing a carb from a 70's CJ and ditching the emissions
> crap...question is, there are 2 vaccuum solenoids on the firewall above the
> valve cover and 3 on the valve cover, what are these for and can I ditch
> them too?
>
> thanks

Re: emissions crap on an 89YJ
 

They are all garbage and you can keep the stock Weber-Carter BBD that's
on there too if you want and still toss the emissions computer.

To physically toss the computer, you have to wire the tach direct. Here
are the directions for killing the computer for a sweet 25%+ seat of the
pants power boost.

http://home.sprynet.com/~dale02/ignmods.htm

It can still pass emissions tuned manually. I kept the vacuum for the
PCV and canister (important), EGR, distributor and air filter flaps
working, all the rest is garbage.

If your stock carb is giving you fits, check this link to make it
purr....

http://www.off-road.com/jeep/tech/engine/carter.html

I don't see how you can use a 70's carb on it, they were 1 BBL, the
newer ones are 2 BBL so you would have to change the intake too.

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

Pi-eyed Piper wrote:
>
> I have an 89YJ, 4.2L
>
> I'm installing a carb from a 70's CJ and ditching the emissions
> crap...question is, there are 2 vaccuum solenoids on the firewall above the
> valve cover and 3 on the valve cover, what are these for and can I ditch
> them too?
>
> thanks

Re: emissions crap on an 89YJ
 

If you live in a Smog State, you should seriously reconsider your actions.

That said, most vacuum is used for smog control. If all vacuum is plugged
off, you should be OK.

From my own experience, you should spend two grand and install the Multi
Port Fuel Injection kit and a header. The Smog stuff is modified to 1994
levels, but it does remain, and the Smog Nazis will be happy with your work.
You will have much better performance than with any carb set up.





"Pi-eyed Piper" <no@way.com> wrote in message
news:SolXd.12398$gJ3.4912@clgrps13...
>I have an 89YJ, 4.2L
>
> I'm installing a carb from a 70's CJ and ditching the emissions
> crap...question is, there are 2 vaccuum solenoids on the firewall above
> the
> valve cover and 3 on the valve cover, what are these for and can I ditch
> them too?
>
> thanks
>
>

Re: emissions crap on an 89YJ
 

If you live in a Smog State, you should seriously reconsider your actions.

That said, most vacuum is used for smog control. If all vacuum is plugged
off, you should be OK.

From my own experience, you should spend two grand and install the Multi
Port Fuel Injection kit and a header. The Smog stuff is modified to 1994
levels, but it does remain, and the Smog Nazis will be happy with your work.
You will have much better performance than with any carb set up.





"Pi-eyed Piper" <no@way.com> wrote in message
news:SolXd.12398$gJ3.4912@clgrps13...
>I have an 89YJ, 4.2L
>
> I'm installing a carb from a 70's CJ and ditching the emissions
> crap...question is, there are 2 vaccuum solenoids on the firewall above
> the
> valve cover and 3 on the valve cover, what are these for and can I ditch
> them too?
>
> thanks
>
>

Re: emissions crap on an 89YJ
 

If you live in a Smog State, you should seriously reconsider your actions.

That said, most vacuum is used for smog control. If all vacuum is plugged
off, you should be OK.

From my own experience, you should spend two grand and install the Multi
Port Fuel Injection kit and a header. The Smog stuff is modified to 1994
levels, but it does remain, and the Smog Nazis will be happy with your work.
You will have much better performance than with any carb set up.





"Pi-eyed Piper" <no@way.com> wrote in message
news:SolXd.12398$gJ3.4912@clgrps13...
>I have an 89YJ, 4.2L
>
> I'm installing a carb from a 70's CJ and ditching the emissions
> crap...question is, there are 2 vaccuum solenoids on the firewall above
> the
> valve cover and 3 on the valve cover, what are these for and can I ditch
> them too?
>
> thanks
>
>

Re: emissions crap on an 89YJ
 

78 is 2 barrel I think. I still need the EGR?


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:422DECE5.5F0DEA55@sympatico.ca...
> They are all garbage and you can keep the stock Weber-Carter BBD that's
> on there too if you want and still toss the emissions computer.
>
> To physically toss the computer, you have to wire the tach direct. Here
> are the directions for killing the computer for a sweet 25%+ seat of the
> pants power boost.
>
> http://home.sprynet.com/~dale02/ignmods.htm
>
> It can still pass emissions tuned manually. I kept the vacuum for the
> PCV and canister (important), EGR, distributor and air filter flaps
> working, all the rest is garbage.
>
> If your stock carb is giving you fits, check this link to make it
> purr....
>
> http://www.off-road.com/jeep/tech/engine/carter.html
>
> I don't see how you can use a 70's carb on it, they were 1 BBL, the
> newer ones are 2 BBL so you would have to change the intake too.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Pi-eyed Piper wrote:
> >
> > I have an 89YJ, 4.2L
> >
> > I'm installing a carb from a 70's CJ and ditching the emissions
> > crap...question is, there are 2 vaccuum solenoids on the firewall above
the
> > valve cover and 3 on the valve cover, what are these for and can I ditch
> > them too?
> >
> > thanks

Re: emissions crap on an 89YJ
 

78 is 2 barrel I think. I still need the EGR?


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:422DECE5.5F0DEA55@sympatico.ca...
> They are all garbage and you can keep the stock Weber-Carter BBD that's
> on there too if you want and still toss the emissions computer.
>
> To physically toss the computer, you have to wire the tach direct. Here
> are the directions for killing the computer for a sweet 25%+ seat of the
> pants power boost.
>
> http://home.sprynet.com/~dale02/ignmods.htm
>
> It can still pass emissions tuned manually. I kept the vacuum for the
> PCV and canister (important), EGR, distributor and air filter flaps
> working, all the rest is garbage.
>
> If your stock carb is giving you fits, check this link to make it
> purr....
>
> http://www.off-road.com/jeep/tech/engine/carter.html
>
> I don't see how you can use a 70's carb on it, they were 1 BBL, the
> newer ones are 2 BBL so you would have to change the intake too.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Pi-eyed Piper wrote:
> >
> > I have an 89YJ, 4.2L
> >
> > I'm installing a carb from a 70's CJ and ditching the emissions
> > crap...question is, there are 2 vaccuum solenoids on the firewall above
the
> > valve cover and 3 on the valve cover, what are these for and can I ditch
> > them too?
> >
> > thanks

Re: emissions crap on an 89YJ
 

78 is 2 barrel I think. I still need the EGR?


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:422DECE5.5F0DEA55@sympatico.ca...
> They are all garbage and you can keep the stock Weber-Carter BBD that's
> on there too if you want and still toss the emissions computer.
>
> To physically toss the computer, you have to wire the tach direct. Here
> are the directions for killing the computer for a sweet 25%+ seat of the
> pants power boost.
>
> http://home.sprynet.com/~dale02/ignmods.htm
>
> It can still pass emissions tuned manually. I kept the vacuum for the
> PCV and canister (important), EGR, distributor and air filter flaps
> working, all the rest is garbage.
>
> If your stock carb is giving you fits, check this link to make it
> purr....
>
> http://www.off-road.com/jeep/tech/engine/carter.html
>
> I don't see how you can use a 70's carb on it, they were 1 BBL, the
> newer ones are 2 BBL so you would have to change the intake too.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Pi-eyed Piper wrote:
> >
> > I have an 89YJ, 4.2L
> >
> > I'm installing a carb from a 70's CJ and ditching the emissions
> > crap...question is, there are 2 vaccuum solenoids on the firewall above
the
> > valve cover and 3 on the valve cover, what are these for and can I ditch
> > them too?
> >
> > thanks