'00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Hi All,

'00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
EXCEPT: cold starts will result in about 10 seconds of roughness, enough
to cause a little bit of wobble to the body.. It runs rough about long
enough after starting to: put on the seatbelt, check behind me in the
mirror and adjust the radio.. After that it is butter smooth.

Oil pressure runs about 50 at highway speeds about 20 at idle.

Runs great other than this. Warm starts (even after a couple of hours
while the internal engine is warm are fine --)

Any ideas? I'm new to Jeep.

Thanks in advance

Marc

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Marc did pass the time by typing:
> Hi All,
>
> '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> to cause a little bit of wobble to the body.. It runs rough about long
> enough after starting to: put on the seatbelt, check behind me in the
> mirror and adjust the radio.. After that it is butter smooth.
>
> Oil pressure runs about 50 at highway speeds about 20 at idle.
>
> Runs great other than this. Warm starts (even after a couple of hours
> while the internal engine is warm are fine --)
>
> Any ideas? I'm new to Jeep.

First off, are you under the 7-70 powertrain warantee? If so, take it
to the dealer.

The primary cause of a rough idle is a clogged IAP (Idle Air Passage)
or gunk in the throttle body.

look here.
http://members.cox.net/wilsond/tb/tb.html

It could also be a sensor reading poorly, but before we go there check/clean
the throttle body.

--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Marc did pass the time by typing:
> Hi All,
>
> '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> to cause a little bit of wobble to the body.. It runs rough about long
> enough after starting to: put on the seatbelt, check behind me in the
> mirror and adjust the radio.. After that it is butter smooth.
>
> Oil pressure runs about 50 at highway speeds about 20 at idle.
>
> Runs great other than this. Warm starts (even after a couple of hours
> while the internal engine is warm are fine --)
>
> Any ideas? I'm new to Jeep.

First off, are you under the 7-70 powertrain warantee? If so, take it
to the dealer.

The primary cause of a rough idle is a clogged IAP (Idle Air Passage)
or gunk in the throttle body.

look here.
http://members.cox.net/wilsond/tb/tb.html

It could also be a sensor reading poorly, but before we go there check/clean
the throttle body.

--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Marc did pass the time by typing:
> Hi All,
>
> '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> to cause a little bit of wobble to the body.. It runs rough about long
> enough after starting to: put on the seatbelt, check behind me in the
> mirror and adjust the radio.. After that it is butter smooth.
>
> Oil pressure runs about 50 at highway speeds about 20 at idle.
>
> Runs great other than this. Warm starts (even after a couple of hours
> while the internal engine is warm are fine --)
>
> Any ideas? I'm new to Jeep.

First off, are you under the 7-70 powertrain warantee? If so, take it
to the dealer.

The primary cause of a rough idle is a clogged IAP (Idle Air Passage)
or gunk in the throttle body.

look here.
http://members.cox.net/wilsond/tb/tb.html

It could also be a sensor reading poorly, but before we go there check/clean
the throttle body.

--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Doug,

Is it best to remove the TB to clean this, or can it be done by spraying
down the slot from the top?

In article <3572c.35550$1k.34221@okepread01>,
post.replies@invalid.address says...
> Marc did pass the time by typing:
> > Hi All,
> >
> > '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> > EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> > to cause a little bit of wobble to the body.. It runs rough about long
> > enough after starting to: put on the seatbelt, check behind me in the
> > mirror and adjust the radio.. After that it is butter smooth.
> >
> > Oil pressure runs about 50 at highway speeds about 20 at idle.
> >
> > Runs great other than this. Warm starts (even after a couple of hours
> > while the internal engine is warm are fine --)
> >
> > Any ideas? I'm new to Jeep.
>
> First off, are you under the 7-70 powertrain warantee? If so, take it
> to the dealer.
>
> The primary cause of a rough idle is a clogged IAP (Idle Air Passage)
> or gunk in the throttle body.
>
> look here.
> http://members.cox.net/wilsond/tb/tb.html
>
> It could also be a sensor reading poorly, but before we go there check/clean
> the throttle body.
>
>

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Doug,

Is it best to remove the TB to clean this, or can it be done by spraying
down the slot from the top?

In article <3572c.35550$1k.34221@okepread01>,
post.replies@invalid.address says...
> Marc did pass the time by typing:
> > Hi All,
> >
> > '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> > EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> > to cause a little bit of wobble to the body.. It runs rough about long
> > enough after starting to: put on the seatbelt, check behind me in the
> > mirror and adjust the radio.. After that it is butter smooth.
> >
> > Oil pressure runs about 50 at highway speeds about 20 at idle.
> >
> > Runs great other than this. Warm starts (even after a couple of hours
> > while the internal engine is warm are fine --)
> >
> > Any ideas? I'm new to Jeep.
>
> First off, are you under the 7-70 powertrain warantee? If so, take it
> to the dealer.
>
> The primary cause of a rough idle is a clogged IAP (Idle Air Passage)
> or gunk in the throttle body.
>
> look here.
> http://members.cox.net/wilsond/tb/tb.html
>
> It could also be a sensor reading poorly, but before we go there check/clean
> the throttle body.
>
>

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Doug,

Is it best to remove the TB to clean this, or can it be done by spraying
down the slot from the top?

In article <3572c.35550$1k.34221@okepread01>,
post.replies@invalid.address says...
> Marc did pass the time by typing:
> > Hi All,
> >
> > '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> > EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> > to cause a little bit of wobble to the body.. It runs rough about long
> > enough after starting to: put on the seatbelt, check behind me in the
> > mirror and adjust the radio.. After that it is butter smooth.
> >
> > Oil pressure runs about 50 at highway speeds about 20 at idle.
> >
> > Runs great other than this. Warm starts (even after a couple of hours
> > while the internal engine is warm are fine --)
> >
> > Any ideas? I'm new to Jeep.
>
> First off, are you under the 7-70 powertrain warantee? If so, take it
> to the dealer.
>
> The primary cause of a rough idle is a clogged IAP (Idle Air Passage)
> or gunk in the throttle body.
>
> look here.
> http://members.cox.net/wilsond/tb/tb.html
>
> It could also be a sensor reading poorly, but before we go there check/clean
> the throttle body.
>
>

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Have over thirty on your spark plugs?
http://www.----------.com/lubeschedule.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

Marc wrote:
>
> Hi All,
>
> '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> to cause a little bit of wobble to the body.. It runs rough about long
> enough after starting to: put on the seatbelt, check behind me in the
> mirror and adjust the radio.. After that it is butter smooth.
>
> Oil pressure runs about 50 at highway speeds about 20 at idle.
>
> Runs great other than this. Warm starts (even after a couple of hours
> while the internal engine is warm are fine --)
>
> Any ideas? I'm new to Jeep.
>
> Thanks in advance
>
> Marc

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Have over thirty on your spark plugs?
http://www.----------.com/lubeschedule.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

Marc wrote:
>
> Hi All,
>
> '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> to cause a little bit of wobble to the body.. It runs rough about long
> enough after starting to: put on the seatbelt, check behind me in the
> mirror and adjust the radio.. After that it is butter smooth.
>
> Oil pressure runs about 50 at highway speeds about 20 at idle.
>
> Runs great other than this. Warm starts (even after a couple of hours
> while the internal engine is warm are fine --)
>
> Any ideas? I'm new to Jeep.
>
> Thanks in advance
>
> Marc

Re: '00 XJ 4.0L - First start when cold problem ---- Please Read..
 

Have over thirty on your spark plugs?
http://www.----------.com/lubeschedule.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

Marc wrote:
>
> Hi All,
>
> '00 Cherokee XJ with 4.0L, 48k miles. Runs perfectly in every way
> EXCEPT: cold starts will result in about 10 seconds of roughness, enough
> to cause a little bit of wobble to the body.. It runs rough about long
> enough after starting to: put on the seatbelt, check behind me in the
> mirror and adjust the radio.. After that it is butter smooth.
>
> Oil pressure runs about 50 at highway speeds about 20 at idle.
>
> Runs great other than this. Warm starts (even after a couple of hours
> while the internal engine is warm are fine --)
>
> Any ideas? I'm new to Jeep.
>
> Thanks in advance
>
> Marc