2004 Jeep GC 4X4 stalls on city road

I was in stop-and-go traffic and the Jeep engine simply turned off. I
shifted the gear into Park and turned the key a few times. The
alternator would rotate, however, the engine would not start. I waited
for 15 seconds and turned the key and this time the engine started.
Otherwise, the Jeep runs great. Any insights? Should I take the Jeep to
the dealer? The Jeep has about 8000 miles on it. Thank you in advance.

What engine does it have? would the engine crank over?
If the engine cranked over it could be a fuel pump problem. If the engine
was just dead and would not crank it might be you Crank Position Sensor.
when the sensor goes it causes some strange things to happen anything from
just dying (which it will do) to starting right up again to not starting for
a couple minutes.

Snow...

"uniskae" > wrote in message
oups.com...
> I was in stop-and-go traffic and the Jeep engine simply turned off. I
> shifted the gear into Park and turned the key a few times. The
> alternator would rotate, however, the engine would not start. I waited
> for 15 seconds and turned the key and this time the engine started.
> Otherwise, the Jeep runs great. Any insights? Should I take the Jeep to
> the dealer? The Jeep has about 8000 miles on it. Thank you in advance.
>

My mistake the engine is a I-6 not a V6.

The Engine does not crank at all, though the alternator is rotating. Is
the Crank Position Sensor a mechanical or electrical device? What do
you mean by "which it will do"?


Snow wrote:
> What engine does it have? would the engine crank over?
> If the engine cranked over it could be a fuel pump problem. If the
engine
> was just dead and would not crank it might be you Crank Position
Sensor.
> when the sensor goes it causes some strange things to happen anything
from
> just dying (which it will do) to starting right up again to not
starting for
> a couple minutes.
>
> Snow...
>
> "uniskae" > wrote in message
> oups.com...
> > I was in stop-and-go traffic and the Jeep engine simply turned off.
I
> > shifted the gear into Park and turned the key a few times. The
> > alternator would rotate, however, the engine would not start. I
waited
> > for 15 seconds and turned the key and this time the engine started.
> > Otherwise, the Jeep runs great. Any insights? Should I take the
Jeep to
> > the dealer? The Jeep has about 8000 miles on it. Thank you in
advance.
> >

Let me get this straight
Your saying the engine does not turnover (crank)
Yet your alternator is rotating.
Man you got big $$$ problems as your dealer would say to your wife :-)

uniskae wrote:

> My mistake the engine is a I-6 not a V6.
>
> The Engine does not crank at all, though the alternator is rotating. Is
> the Crank Position Sensor a mechanical or electrical device? What do
> you mean by "which it will do"?
>
>
> Snow wrote:
>
>>What engine does it have? would the engine crank over?
>>If the engine cranked over it could be a fuel pump problem. If the
>
> engine
>
>>was just dead and would not crank it might be you Crank Position
>
> Sensor.
>
>>when the sensor goes it causes some strange things to happen anything
>
> from
>
>>just dying (which it will do) to starting right up again to not
>
> starting for
>
>>a couple minutes.
>>
>>Snow...
>>
>>"uniskae" > wrote in message
groups.com...
>>
>>>I was in stop-and-go traffic and the Jeep engine simply turned off.
>
> I
>
>>>shifted the gear into Park and turned the key a few times. The
>>>alternator would rotate, however, the engine would not start. I
>
> waited
>
>>>for 15 seconds and turned the key and this time the engine started.
>>>Otherwise, the Jeep runs great. Any insights? Should I take the
>
> Jeep to
>
>>>the dealer? The Jeep has about 8000 miles on it. Thank you in
>
> advance.
>
>

Take it straight to the Stealership.
For your own curiosity, pull the fault codes, by turning the
ignition key until the digital odometer displays, repeat three times in
succession and then back to "On" (On/Off, On/Off, On/Off, On). At the
fourth "On" the odometer will be replaced with codes. If no codes are
present then "Done" will appear: http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
http://www.billhughes.com/

uniskae wrote:
>
> I was in stop-and-go traffic and the Jeep engine simply turned off. I
> shifted the gear into Park and turned the key a few times. The
> alternator would rotate, however, the engine would not start. I waited
> for 15 seconds and turned the key and this time the engine started.
> Otherwise, the Jeep runs great. Any insights? Should I take the Jeep to
> the dealer? The Jeep has about 8000 miles on it. Thank you in advance.

I think that the words you are using for parts don't exactly match up with
the words we know them by.

Cranking: The engine moves in a way that simulates running, but is being
driven by an electric starter motor attached to the back of the engine.
All major assemblies are in motion. When you turn the key to "Start" is
should "crank" or "turn over".

Alternator: An electrical part, about the size of a can of nuts, located
on the front of the engine, driven by a belt from the crankshaft. It
produces electricity. Alternators cannot motor by themselves. If the
engine is not turning the alternator cannot be turning.

Crank Position Sensor: A small electronic part located at the back of the
engine, it senses when a particular spot on the flywheel rotates past it.
The CPS tells the engine computer where in the rotation cycle the engine
is and how fast it is running. If the CPS dies the computer thinks that
the engine is not running and will not deliver spark or fuel.

Mike's "which it will do" means that CPS failure is a well-known problem
for some Jeeps.

If you've got only 8000 miles on the Jeep and it is stalling in traffic
you should take it to the dealer. It is still new. Make it their
problem.


On Tue, 7 Dec 2004, uniskae wrote:

> My mistake the engine is a I-6 not a V6.
>
> The Engine does not crank at all, though the alternator is rotating. Is
> the Crank Position Sensor a mechanical or electrical device? What do
> you mean by "which it will do"?
>
>
> Snow wrote:
>> What engine does it have? would the engine crank over?
>> If the engine cranked over it could be a fuel pump problem. If the
> engine
>> was just dead and would not crank it might be you Crank Position
> Sensor.
>> when the sensor goes it causes some strange things to happen anything
> from
>> just dying (which it will do) to starting right up again to not
> starting for
>> a couple minutes.
>>
>> Snow...
>>
>> "uniskae" > wrote in message
>> oups.com...
>>> I was in stop-and-go traffic and the Jeep engine simply turned off.
> I
>>> shifted the gear into Park and turned the key a few times. The
>>> alternator would rotate, however, the engine would not start. I
> waited
>>> for 15 seconds and turned the key and this time the engine started.
>>> Otherwise, the Jeep runs great. Any insights? Should I take the
> Jeep to
>>> the dealer? The Jeep has about 8000 miles on it. Thank you in
> advance.
>>>
>
>

--
Some conditions apply. YMMV. This message was packed by weight, not
by volume. TWIAVBP, local variation may occur. Dramatization, not a real
authority. Do not induce vomiting. No user-serviceable words inside.

Translation issues, we mean turn over when we say 'crank' and for sure
if the alternator up top is turning, the starter down below is
'cranking' the engine over.

It is not 'firing' when cranking sounds more like it.

If under warranty, I would take it back with suspected CPS issues. It
is an electronic part located at 10:00 on the bell housing looking from
the back.

The plug for it gets dirty and causes stalls. The plug is just above
the exhaust manifold on the back driver's side.

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

uniskae wrote:
>
> My mistake the engine is a I-6 not a V6.
>
> The Engine does not crank at all, though the alternator is rotating. Is
> the Crank Position Sensor a mechanical or electrical device? What do
> you mean by "which it will do"?
>
> Snow wrote:
> > What engine does it have? would the engine crank over?
> > If the engine cranked over it could be a fuel pump problem. If the
> engine
> > was just dead and would not crank it might be you Crank Position
> Sensor.
> > when the sensor goes it causes some strange things to happen anything
> from
> > just dying (which it will do) to starting right up again to not
> starting for
> > a couple minutes.
> >
> > Snow...
> >
> > "uniskae" > wrote in message
> > oups.com...
> > > I was in stop-and-go traffic and the Jeep engine simply turned off.
> I
> > > shifted the gear into Park and turned the key a few times. The
> > > alternator would rotate, however, the engine would not start. I
> waited
> > > for 15 seconds and turned the key and this time the engine started.
> > > Otherwise, the Jeep runs great. Any insights? Should I take the
> Jeep to
> > > the dealer? The Jeep has about 8000 miles on it. Thank you in
> advance.
> > >

I've broken two cranks which left their generators spinning like a
motor. :-(
God Bless America, ßill O|||||||O
http://www.billhughes.com/

Mike Romain wrote:
>
> Translation issues, we mean turn over when we say 'crank' and for sure
> if the alternator up top is turning, the starter down below is
> 'cranking' the engine over.
>
> It is not 'firing' when cranking sounds more like it.
>
> If under warranty, I would take it back with suspected CPS issues. It
> is an electronic part located at 10:00 on the bell housing looking from
> the back.
>
> The plug for it gets dirty and causes stalls. The plug is just above
> the exhaust manifold on the back driver's side.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

I incorrectly thought the alternator and the starter motor are the same
(Incorrect assumption: The alternator is normally a generator but acts
as a motor when the engine starts hence the name alternator). But after
reading your post I checked up the web and now I know: the alternator
is not the same as the starter motor. I meant the starter motor in my
original message.

When I had the problem, it seemed to me when I turn the key, the
starter motor is running but the engine is not turning (I did not feel
any shuddering when the engine kicks in). I got the feeling that the
starter motor somehow did not couple with the engine. Or maybe the
engine was turning but there was no spark or fuel.

I am scared that the engine might stop in the middle of a busy highway.
The dealer is likely to find "no problem". I should go the dealer
anyway...

Bitchen. :-) Although many motorcycles operate that way.
Yes, go to the Stealership, that's what warranties are for.
God Bless America, ßill O|||||||O
http://www.billhughes.com/

uniskae wrote:
>
> I incorrectly thought the alternator and the starter motor are the same
> (Incorrect assumption: The alternator is normally a generator but acts
> as a motor when the engine starts hence the name alternator). But after
> reading your post I checked up the web and now I know: the alternator
> is not the same as the starter motor. I meant the starter motor in my
> original message.
>
> When I had the problem, it seemed to me when I turn the key, the
> starter motor is running but the engine is not turning (I did not feel
> any shuddering when the engine kicks in). I got the feeling that the
> starter motor somehow did not couple with the engine. Or maybe the
> engine was turning but there was no spark or fuel.
>
> I am scared that the engine might stop in the middle of a busy highway.
> The dealer is likely to find "no problem". I should go the dealer
> anyway...