Having trouble keeping it going
 

I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
would replace and check the locations of all the vacuum lines however the
diagrams I have are not very helpful. I've checked the timing and made sure
the vacuum advance mechanism is working also. I can work the idle screw so
it will idle high and that helps, but then the engine RPM's are over 2K at
idle.

Any help would be great!!

Thanks,

Dwayne

Re: Having trouble keeping it going
 

Dwayne Smith did pass the time by typing:
> I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
> idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
> would replace and check the locations of all the vacuum lines however the
> diagrams I have are not very helpful. I've checked the timing and made sure
> the vacuum advance mechanism is working also. I can work the idle screw so
> it will idle high and that helps, but then the engine RPM's are over 2K at
> idle.
>
> Any help would be great!!

On my old C-10 I just went around and sprayed TB cleaner on every hose
connection. Eventually I found two areas, one was the carb gasket and
the other was the brake booster. Another worker had similar
issues and it was the vacuum reservoir. His old Ford used a tin can
as the reservoir and it had a hairline crack right around the seam.

Grab yourself a vac gauge, they are handy for diagnosing these problems.

You did say you rebuilt the carb, did you adjust the mix? Too rich/lean
will also cause idle stumble.

--
DougW

Re: Having trouble keeping it going
 

Dwayne Smith did pass the time by typing:
> I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
> idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
> would replace and check the locations of all the vacuum lines however the
> diagrams I have are not very helpful. I've checked the timing and made sure
> the vacuum advance mechanism is working also. I can work the idle screw so
> it will idle high and that helps, but then the engine RPM's are over 2K at
> idle.
>
> Any help would be great!!

On my old C-10 I just went around and sprayed TB cleaner on every hose
connection. Eventually I found two areas, one was the carb gasket and
the other was the brake booster. Another worker had similar
issues and it was the vacuum reservoir. His old Ford used a tin can
as the reservoir and it had a hairline crack right around the seam.

Grab yourself a vac gauge, they are handy for diagnosing these problems.

You did say you rebuilt the carb, did you adjust the mix? Too rich/lean
will also cause idle stumble.

--
DougW

Re: Having trouble keeping it going
 

Dwayne Smith did pass the time by typing:
> I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
> idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
> would replace and check the locations of all the vacuum lines however the
> diagrams I have are not very helpful. I've checked the timing and made sure
> the vacuum advance mechanism is working also. I can work the idle screw so
> it will idle high and that helps, but then the engine RPM's are over 2K at
> idle.
>
> Any help would be great!!

On my old C-10 I just went around and sprayed TB cleaner on every hose
connection. Eventually I found two areas, one was the carb gasket and
the other was the brake booster. Another worker had similar
issues and it was the vacuum reservoir. His old Ford used a tin can
as the reservoir and it had a hairline crack right around the seam.

Grab yourself a vac gauge, they are handy for diagnosing these problems.

You did say you rebuilt the carb, did you adjust the mix? Too rich/lean
will also cause idle stumble.

--
DougW

Re: Having trouble keeping it going
 

Dwayne Smith did pass the time by typing:
> I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
> idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
> would replace and check the locations of all the vacuum lines however the
> diagrams I have are not very helpful. I've checked the timing and made sure
> the vacuum advance mechanism is working also. I can work the idle screw so
> it will idle high and that helps, but then the engine RPM's are over 2K at
> idle.
>
> Any help would be great!!

On my old C-10 I just went around and sprayed TB cleaner on every hose
connection. Eventually I found two areas, one was the carb gasket and
the other was the brake booster. Another worker had similar
issues and it was the vacuum reservoir. His old Ford used a tin can
as the reservoir and it had a hairline crack right around the seam.

Grab yourself a vac gauge, they are handy for diagnosing these problems.

You did say you rebuilt the carb, did you adjust the mix? Too rich/lean
will also cause idle stumble.

--
DougW

Re: Having trouble keeping it going
 

Try this website.
http://home.sprynet.com/~dale02/vacuhose.htm
I had lots of the same trouble, and it was all vacuum oriented
thats not to mean that yours is too, just a common problem......take the time
to chase out all of your vacuum lines....that wire diagram may not be
perfect, but I have the 89 and it was accurate for mine....still the 258




Dwayne Smith wrote:
>I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
>idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
>would replace and check the locations of all the vacuum lines however the
>diagrams I have are not very helpful. I've checked the timing and made sure
>the vacuum advance mechanism is working also. I can work the idle screw so
>it will idle high and that helps, but then the engine RPM's are over 2K at
>idle.
>
>Any help would be great!!
>
>Thanks,
>
>Dwayne


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/jeep-cars/200506/1

Re: Having trouble keeping it going
 

Try this website.
http://home.sprynet.com/~dale02/vacuhose.htm
I had lots of the same trouble, and it was all vacuum oriented
thats not to mean that yours is too, just a common problem......take the time
to chase out all of your vacuum lines....that wire diagram may not be
perfect, but I have the 89 and it was accurate for mine....still the 258




Dwayne Smith wrote:
>I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
>idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
>would replace and check the locations of all the vacuum lines however the
>diagrams I have are not very helpful. I've checked the timing and made sure
>the vacuum advance mechanism is working also. I can work the idle screw so
>it will idle high and that helps, but then the engine RPM's are over 2K at
>idle.
>
>Any help would be great!!
>
>Thanks,
>
>Dwayne


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/jeep-cars/200506/1

Re: Having trouble keeping it going
 

Try this website.
http://home.sprynet.com/~dale02/vacuhose.htm
I had lots of the same trouble, and it was all vacuum oriented
thats not to mean that yours is too, just a common problem......take the time
to chase out all of your vacuum lines....that wire diagram may not be
perfect, but I have the 89 and it was accurate for mine....still the 258




Dwayne Smith wrote:
>I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
>idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
>would replace and check the locations of all the vacuum lines however the
>diagrams I have are not very helpful. I've checked the timing and made sure
>the vacuum advance mechanism is working also. I can work the idle screw so
>it will idle high and that helps, but then the engine RPM's are over 2K at
>idle.
>
>Any help would be great!!
>
>Thanks,
>
>Dwayne


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/jeep-cars/200506/1

Re: Having trouble keeping it going
 

Try this website.
http://home.sprynet.com/~dale02/vacuhose.htm
I had lots of the same trouble, and it was all vacuum oriented
thats not to mean that yours is too, just a common problem......take the time
to chase out all of your vacuum lines....that wire diagram may not be
perfect, but I have the 89 and it was accurate for mine....still the 258




Dwayne Smith wrote:
>I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
>idling. I've rebuilt the carb and replaced a couple worn out vacuum lines. I
>would replace and check the locations of all the vacuum lines however the
>diagrams I have are not very helpful. I've checked the timing and made sure
>the vacuum advance mechanism is working also. I can work the idle screw so
>it will idle high and that helps, but then the engine RPM's are over 2K at
>idle.
>
>Any help would be great!!
>
>Thanks,
>
>Dwayne


--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/jeep-cars/200506/1

Re: Having trouble keeping it going
 

Thanks for the help. This diagram looks alot better then the one I got my
hands on.

Dwayne


"Robb S via CarKB.com" <forum@CarKB.com> wrote in message
news:50170884D6AE0@CarKB.com...
> Try this website.
> http://home.sprynet.com/~dale02/vacuhose.htm
> I had lots of the same trouble, and it was all vacuum oriented
> thats not to mean that yours is too, just a common problem......take the
time
> to chase out all of your vacuum lines....that wire diagram may not be
> perfect, but I have the 89 and it was accurate for mine....still the 258
>
>
>
>
> Dwayne Smith wrote:
> >I have an 89 Jeep YJ 4.2L and I'm having a hard time keeping the engine
> >idling. I've rebuilt the carb and replaced a couple worn out vacuum
lines. I
> >would replace and check the locations of all the vacuum lines however the
> >diagrams I have are not very helpful. I've checked the timing and made
sure
> >the vacuum advance mechanism is working also. I can work the idle screw
so
> >it will idle high and that helps, but then the engine RPM's are over 2K
at
> >idle.
> >
> >Any help would be great!!
> >
> >Thanks,
> >
> >Dwayne
>
>
> --
> Message posted via CarKB.com
> http://www.carkb.com/Uwe/Forums.aspx/jeep-cars/200506/1