Rjb

Ok a few weeks ago my cherokee started to overheat when just sitting,
so I replaced the thermostat which was bad. But it still overheated
after shutting the engine off, so I replaced the water pump, then the
coolent fan switch I also flushed it and refilled with new
anti-freeze. Now it still does it, what happens is the temperature
gauge says its fine, but when I shut the engine off coolent boils out.
Now lately I have been having irradic idle, like it will stay at 700
rpms then dip down to 200 and go back up to 700. And it will hesitate
real bad. What could be the causes of these? Are the related? I'm
thinking dirty injectors for the idle, or bad fuel pump I just put a
new fuel filter on about 3 weeks ago. Any help would be apreciated as
I am going crazy tyring to figer this thing out.

Snow

For the hesitation I would be thinking along the lines of your J**P needing
a tune-up, plugs, cap, rotor, plug wires and maybe even a new coil depending
on when/if it was changed. As for the over heating, it almost sounds like a
blocked rad.

Snow...


"Rjb" <rjb@thepoint.com> wrote in message
news:77084228.0308242207.e6e2231@posting.google.co m...
> Ok a few weeks ago my cherokee started to overheat when just sitting,
> so I replaced the thermostat which was bad. But it still overheated
> after shutting the engine off, so I replaced the water pump, then the
> coolent fan switch I also flushed it and refilled with new
> anti-freeze. Now it still does it, what happens is the temperature
> gauge says its fine, but when I shut the engine off coolent boils out.
> Now lately I have been having irradic idle, like it will stay at 700
> rpms then dip down to 200 and go back up to 700. And it will hesitate
> real bad. What could be the causes of these? Are the related? I'm
> thinking dirty injectors for the idle, or bad fuel pump I just put a
> new fuel filter on about 3 weeks ago. Any help would be apreciated as
> I am going crazy tyring to figer this thing out.

Snow

For the hesitation I would be thinking along the lines of your J**P needing
a tune-up, plugs, cap, rotor, plug wires and maybe even a new coil depending
on when/if it was changed. As for the over heating, it almost sounds like a
blocked rad.

Snow...


"Rjb" <rjb@thepoint.com> wrote in message
news:77084228.0308242207.e6e2231@posting.google.co m...
> Ok a few weeks ago my cherokee started to overheat when just sitting,
> so I replaced the thermostat which was bad. But it still overheated
> after shutting the engine off, so I replaced the water pump, then the
> coolent fan switch I also flushed it and refilled with new
> anti-freeze. Now it still does it, what happens is the temperature
> gauge says its fine, but when I shut the engine off coolent boils out.
> Now lately I have been having irradic idle, like it will stay at 700
> rpms then dip down to 200 and go back up to 700. And it will hesitate
> real bad. What could be the causes of these? Are the related? I'm
> thinking dirty injectors for the idle, or bad fuel pump I just put a
> new fuel filter on about 3 weeks ago. Any help would be apreciated as
> I am going crazy tyring to figer this thing out.

Rjb

No oil in the coolant and no coolant in the oil. It has not overheated
in the last few days, I think maybe there was air in the system. I
kept putting more coolant in everyday for the last few days and it
hasn't overflowed since. According to my manual causes for hesitation
are, dirty injectors, bad fuel pump, ignition timing off(also cause
for abnormal coolant loss). I changed the plugs and 1 of the spark
plug wires about a month ago, it was broken. Anymore things I can
check?


"Larry St. Regis" <lstregis@DONT_SPAM_HEREi4putt.com> wrote in message news:<qUq2b.5358$7L3.176@newssvr29.news.prodigy.co m>...
> "Snow" <snowball_2004@msn.com> wrote in message
> news:5yq2b.2856$Cg2.316126@news20.bellglobal.com.. .
> > For the hesitation I would be thinking along the lines of your J**P
> needing
> > a tune-up, plugs, cap, rotor, plug wires and maybe even a new coil
> depending
> > on when/if it was changed. As for the over heating, it almost sounds like
> a
> > blocked rad.
> >
> > Snow...
> >
> >
> > "Rjb" <rjb@thepoint.com> wrote in message
> > news:77084228.0308242207.e6e2231@posting.google.co m...
> > > Ok a few weeks ago my cherokee started to overheat when just sitting,
> > > so I replaced the thermostat which was bad. But it still overheated
> > > after shutting the engine off, so I replaced the water pump, then the
> > > coolent fan switch I also flushed it and refilled with new
> > > anti-freeze. Now it still does it, what happens is the temperature
> > > gauge says its fine, but when I shut the engine off coolent boils out.
> > > Now lately I have been having irradic idle, like it will stay at 700
> > > rpms then dip down to 200 and go back up to 700. And it will hesitate
> > > real bad. What could be the causes of these? Are the related? I'm
> > > thinking dirty injectors for the idle, or bad fuel pump I just put a
> > > new fuel filter on about 3 weeks ago. Any help would be apreciated as
> > > I am going crazy tyring to figer this thing out.
> >
>
> If I'm not mistaken, coolant pumping out AFTER the motor is turned off is
> indicative of a blown head gasket? You're getting too much pressure in the
> coolant circuit. This would also explain your erratic idle condition.
>
> Do you have milky-looking oil? Oil in the coolant? White smoke (steam) from
> the tailpipe? Did the vehicle overheat badly prior to this happening?
>
> Larry
> '87 XJ

Rjb

No oil in the coolant and no coolant in the oil. It has not overheated
in the last few days, I think maybe there was air in the system. I
kept putting more coolant in everyday for the last few days and it
hasn't overflowed since. According to my manual causes for hesitation
are, dirty injectors, bad fuel pump, ignition timing off(also cause
for abnormal coolant loss). I changed the plugs and 1 of the spark
plug wires about a month ago, it was broken. Anymore things I can
check?


"Larry St. Regis" <lstregis@DONT_SPAM_HEREi4putt.com> wrote in message news:<qUq2b.5358$7L3.176@newssvr29.news.prodigy.co m>...
> "Snow" <snowball_2004@msn.com> wrote in message
> news:5yq2b.2856$Cg2.316126@news20.bellglobal.com.. .
> > For the hesitation I would be thinking along the lines of your J**P
> needing
> > a tune-up, plugs, cap, rotor, plug wires and maybe even a new coil
> depending
> > on when/if it was changed. As for the over heating, it almost sounds like
> a
> > blocked rad.
> >
> > Snow...
> >
> >
> > "Rjb" <rjb@thepoint.com> wrote in message
> > news:77084228.0308242207.e6e2231@posting.google.co m...
> > > Ok a few weeks ago my cherokee started to overheat when just sitting,
> > > so I replaced the thermostat which was bad. But it still overheated
> > > after shutting the engine off, so I replaced the water pump, then the
> > > coolent fan switch I also flushed it and refilled with new
> > > anti-freeze. Now it still does it, what happens is the temperature
> > > gauge says its fine, but when I shut the engine off coolent boils out.
> > > Now lately I have been having irradic idle, like it will stay at 700
> > > rpms then dip down to 200 and go back up to 700. And it will hesitate
> > > real bad. What could be the causes of these? Are the related? I'm
> > > thinking dirty injectors for the idle, or bad fuel pump I just put a
> > > new fuel filter on about 3 weeks ago. Any help would be apreciated as
> > > I am going crazy tyring to figer this thing out.
> >
>
> If I'm not mistaken, coolant pumping out AFTER the motor is turned off is
> indicative of a blown head gasket? You're getting too much pressure in the
> coolant circuit. This would also explain your erratic idle condition.
>
> Do you have milky-looking oil? Oil in the coolant? White smoke (steam) from
> the tailpipe? Did the vehicle overheat badly prior to this happening?
>
> Larry
> '87 XJ

Dave Milne

Try jeepsareus.com

<http://www.jeepsareus.com/cgi-bin/mi...Screen=PROD&St
ore_Code=JAU&Product_Code=mb209&Category_Code=Rebu ilding>

The link is to the Wrangler bottle to give you an idea on price (is it the
same even ?). I couldn't find a Cherokee bottle on their Cherokee page, but
it's worth giving them a call.

Obviously, being in another country, I have no connection with them, but I
have had great service on the bits I have bought so far.

Dave Milne, Scotland
'99 TJ 4.0 Sahara

"Rjb" <rjb@thepoint.com> wrote in message
news:77084228.0308301328.142b1046@posting.google.c om...
: I think I found the problem with the coolant loss, there is a crack in
: the top of my coolant bottle. Anyone know of anyplace online that
: sells these?
:
:
:
:
: rjb@thepoint.com (Rjb) wrote in message
news:<77084228.0308261741.229eafa6@posting.google. com>...
: > No oil in the coolant and no coolant in the oil. It has not overheated
: > in the last few days, I think maybe there was air in the system. I
: > kept putting more coolant in everyday for the last few days and it
: > hasn't overflowed since. According to my manual causes for hesitation
: > are, dirty injectors, bad fuel pump, ignition timing off(also cause
: > for abnormal coolant loss). I changed the plugs and 1 of the spark
: > plug wires about a month ago, it was broken. Anymore things I can
: > check?
: >
: >
: > "Larry St. Regis" <lstregis@DONT_SPAM_HEREi4putt.com> wrote in message
news:<qUq2b.5358$7L3.176@newssvr29.news.prodigy.co m>...
: > > "Snow" <snowball_2004@msn.com> wrote in message
: > > news:5yq2b.2856$Cg2.316126@news20.bellglobal.com.. .
: > > > For the hesitation I would be thinking along the lines of your J**P
: > needing
: > > > a tune-up, plugs, cap, rotor, plug wires and maybe even a new coil
: > depending
: > > > on when/if it was changed. As for the over heating, it almost
sounds like
: > a
: > > > blocked rad.
: > > >
: > > > Snow...
: > > >
: > > >
: > > > "Rjb" <rjb@thepoint.com> wrote in message
: > > > news:77084228.0308242207.e6e2231@posting.google.co m...
: > > > > Ok a few weeks ago my cherokee started to overheat when just
sitting,
: > > > > so I replaced the thermostat which was bad. But it still
overheated
: > > > > after shutting the engine off, so I replaced the water pump, then
the
: > > > > coolent fan switch I also flushed it and refilled with new
: > > > > anti-freeze. Now it still does it, what happens is the temperature
: > > > > gauge says its fine, but when I shut the engine off coolent boils
out.
: > > > > Now lately I have been having irradic idle, like it will stay at
700
: > > > > rpms then dip down to 200 and go back up to 700. And it will
hesitate
: > > > > real bad. What could be the causes of these? Are the related? I'm
: > > > > thinking dirty injectors for the idle, or bad fuel pump I just put
a
: > > > > new fuel filter on about 3 weeks ago. Any help would be apreciated
as
: > > > > I am going crazy tyring to figer this thing out.
: > > >
: > >
: > > If I'm not mistaken, coolant pumping out AFTER the motor is turned off
is
: > > indicative of a blown head gasket? You're getting too much pressure
in the
: > > coolant circuit. This would also explain your erratic idle condition.
: > >
: > > Do you have milky-looking oil? Oil in the coolant? White smoke (steam)
from
: > > the tailpipe? Did the vehicle overheat badly prior to this happening?
: > >
: > > Larry
: > > '87 XJ

Dave Milne

Try jeepsareus.com

<http://www.jeepsareus.com/cgi-bin/mi...Screen=PROD&St
ore_Code=JAU&Product_Code=mb209&Category_Code=Rebu ilding>

The link is to the Wrangler bottle to give you an idea on price (is it the
same even ?). I couldn't find a Cherokee bottle on their Cherokee page, but
it's worth giving them a call.

Obviously, being in another country, I have no connection with them, but I
have had great service on the bits I have bought so far.

Dave Milne, Scotland
'99 TJ 4.0 Sahara

"Rjb" <rjb@thepoint.com> wrote in message
news:77084228.0308301328.142b1046@posting.google.c om...
: I think I found the problem with the coolant loss, there is a crack in
: the top of my coolant bottle. Anyone know of anyplace online that
: sells these?
:
:
:
:
: rjb@thepoint.com (Rjb) wrote in message
news:<77084228.0308261741.229eafa6@posting.google. com>...
: > No oil in the coolant and no coolant in the oil. It has not overheated
: > in the last few days, I think maybe there was air in the system. I
: > kept putting more coolant in everyday for the last few days and it
: > hasn't overflowed since. According to my manual causes for hesitation
: > are, dirty injectors, bad fuel pump, ignition timing off(also cause
: > for abnormal coolant loss). I changed the plugs and 1 of the spark
: > plug wires about a month ago, it was broken. Anymore things I can
: > check?
: >
: >
: > "Larry St. Regis" <lstregis@DONT_SPAM_HEREi4putt.com> wrote in message
news:<qUq2b.5358$7L3.176@newssvr29.news.prodigy.co m>...
: > > "Snow" <snowball_2004@msn.com> wrote in message
: > > news:5yq2b.2856$Cg2.316126@news20.bellglobal.com.. .
: > > > For the hesitation I would be thinking along the lines of your J**P
: > needing
: > > > a tune-up, plugs, cap, rotor, plug wires and maybe even a new coil
: > depending
: > > > on when/if it was changed. As for the over heating, it almost
sounds like
: > a
: > > > blocked rad.
: > > >
: > > > Snow...
: > > >
: > > >
: > > > "Rjb" <rjb@thepoint.com> wrote in message
: > > > news:77084228.0308242207.e6e2231@posting.google.co m...
: > > > > Ok a few weeks ago my cherokee started to overheat when just
sitting,
: > > > > so I replaced the thermostat which was bad. But it still
overheated
: > > > > after shutting the engine off, so I replaced the water pump, then
the
: > > > > coolent fan switch I also flushed it and refilled with new
: > > > > anti-freeze. Now it still does it, what happens is the temperature
: > > > > gauge says its fine, but when I shut the engine off coolent boils
out.
: > > > > Now lately I have been having irradic idle, like it will stay at
700
: > > > > rpms then dip down to 200 and go back up to 700. And it will
hesitate
: > > > > real bad. What could be the causes of these? Are the related? I'm
: > > > > thinking dirty injectors for the idle, or bad fuel pump I just put
a
: > > > > new fuel filter on about 3 weeks ago. Any help would be apreciated
as
: > > > > I am going crazy tyring to figer this thing out.
: > > >
: > >
: > > If I'm not mistaken, coolant pumping out AFTER the motor is turned off
is
: > > indicative of a blown head gasket? You're getting too much pressure
in the
: > > coolant circuit. This would also explain your erratic idle condition.
: > >
: > > Do you have milky-looking oil? Oil in the coolant? White smoke (steam)
from
: > > the tailpipe? Did the vehicle overheat badly prior to this happening?
: > >
: > > Larry
: > > '87 XJ