Re: 93 Jeep Cherokee won't start
 

You say "the plugs are not firing" ... do you mean no spark? And if that was
just a typo, maybe rethink the fuel pump ... mine intermittently failed a
few times untill it finally failed for good with the symptoms exactly as you
have described.


"Ray" <raydog153@hotmail.com> wrote in message
news:17ce08d4.0312010539.1f0e8c17@posting.google.c om...
> The jeep is V6, auto. It ran fine every day till I let it sit for a
> month, now I can't get it started. Never had a starting problem. I
> have talked to three mechanics, and tried many things. I tried a new
> coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> position sensor). I don't get it, after I put the new CPS in it
> started, then I shut it off, and tried to start it again, and
> wouldn't. I pulled it out, made sure there was a good ground, nothing,
> just cranks and cranks. I tried the ground thing, made sure the block
> had a good ground using jumper cables still nothing. I unplugged all
> the connectors to everything and replugged them in, tried to start it,
> and it started, then shut it down and it won't start again. I did the
> same thing, unplugging everything, and still nothing. I got yet
> another CPS and tried that, still nothing, so I don't think it is
> that. The plugs are not firing. The timing belt is fine. Those are the
> only two times I have gotten it to start in over 100 tries. I have
> plundered the newsgroups looking for advice, the two main things I
> tried (grounding and CPS), and all the obvious stuff. What else could
> it be? When it did start up, it started up instantly. I also tried
> starting fluid, and am pretty sure it is not the fuel pump.
>
> Please help with advise, I hate to take it in the shop after trying
> all this stuff, since they will do the same stuff, or I am afraid it
> will work for them.

Re: 93 Jeep Cherokee won't start
 

You say "the plugs are not firing" ... do you mean no spark? And if that was
just a typo, maybe rethink the fuel pump ... mine intermittently failed a
few times untill it finally failed for good with the symptoms exactly as you
have described.


"Ray" <raydog153@hotmail.com> wrote in message
news:17ce08d4.0312010539.1f0e8c17@posting.google.c om...
> The jeep is V6, auto. It ran fine every day till I let it sit for a
> month, now I can't get it started. Never had a starting problem. I
> have talked to three mechanics, and tried many things. I tried a new
> coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> position sensor). I don't get it, after I put the new CPS in it
> started, then I shut it off, and tried to start it again, and
> wouldn't. I pulled it out, made sure there was a good ground, nothing,
> just cranks and cranks. I tried the ground thing, made sure the block
> had a good ground using jumper cables still nothing. I unplugged all
> the connectors to everything and replugged them in, tried to start it,
> and it started, then shut it down and it won't start again. I did the
> same thing, unplugging everything, and still nothing. I got yet
> another CPS and tried that, still nothing, so I don't think it is
> that. The plugs are not firing. The timing belt is fine. Those are the
> only two times I have gotten it to start in over 100 tries. I have
> plundered the newsgroups looking for advice, the two main things I
> tried (grounding and CPS), and all the obvious stuff. What else could
> it be? When it did start up, it started up instantly. I also tried
> starting fluid, and am pretty sure it is not the fuel pump.
>
> Please help with advise, I hate to take it in the shop after trying
> all this stuff, since they will do the same stuff, or I am afraid it
> will work for them.

Re: 93 Jeep Cherokee won't start
 

You say "the plugs are not firing" ... do you mean no spark? And if that was
just a typo, maybe rethink the fuel pump ... mine intermittently failed a
few times untill it finally failed for good with the symptoms exactly as you
have described.


"Ray" <raydog153@hotmail.com> wrote in message
news:17ce08d4.0312010539.1f0e8c17@posting.google.c om...
> The jeep is V6, auto. It ran fine every day till I let it sit for a
> month, now I can't get it started. Never had a starting problem. I
> have talked to three mechanics, and tried many things. I tried a new
> coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> position sensor). I don't get it, after I put the new CPS in it
> started, then I shut it off, and tried to start it again, and
> wouldn't. I pulled it out, made sure there was a good ground, nothing,
> just cranks and cranks. I tried the ground thing, made sure the block
> had a good ground using jumper cables still nothing. I unplugged all
> the connectors to everything and replugged them in, tried to start it,
> and it started, then shut it down and it won't start again. I did the
> same thing, unplugging everything, and still nothing. I got yet
> another CPS and tried that, still nothing, so I don't think it is
> that. The plugs are not firing. The timing belt is fine. Those are the
> only two times I have gotten it to start in over 100 tries. I have
> plundered the newsgroups looking for advice, the two main things I
> tried (grounding and CPS), and all the obvious stuff. What else could
> it be? When it did start up, it started up instantly. I also tried
> starting fluid, and am pretty sure it is not the fuel pump.
>
> Please help with advise, I hate to take it in the shop after trying
> all this stuff, since they will do the same stuff, or I am afraid it
> will work for them.

Re: 93 Jeep Cherokee won't start
 

Please READ my post, as I stated in my post that one of the things I
tried was checking the ground wire and running a jumper from the block
to the battery. I also changed the CPS twice.

Ok, new info, I got the computer codes, and I had 12, 54, and 55. So
it seems like 54 is probably my problem. Is there a way to reset the
codes so I can make sure I get the same code. Would the Hall effect
sensor under the rotor cause this? I am going to pick this part up
tomorrow and try this. I did play with all the relays, swapping the
positions with the starer, and checked the fuses, so I am pretty sure
is is not a fuse or relay like the ASD.

Yes the PCM could be gone, but why would it have started those two
times? Well thanks for you help so far, I will keep looking.

"Snow" <snowball_2004@msn.com> wrote in message news:<gjLyb.3967$zf2.502753@news20.bellglobal.com> ...
> Before Mike R. say's it.. have you checked the ground wire from the engine
> block to the fire wall?? if that cable is shot it will cause similar
> symptoms. To check this, run a jumper cable from the negative terminal on
> the battery to the engine block, if jeep starts then that the problem.
>
> Snow...
>
> "----" <r------33@cableone.net> wrote in message
> news:3nmmsv4utft4todaabp0i48ui4nkfcpf0q@4ax.com...
> > First, there is no such thing as a V6 in a 1993 Jeep. It is either an
> > I-6 or a V8. The CPS seems to be the most common failure point, but
> > you have other components to consider. If the automatic shut down
> > relay (ASD) is not working, the engine will not start. The overall
> > brain of the engine is the Powertrain Control Module (PCM.) If that
> > is faulty nothing works. The PCM drives the ASD relay. The PCM takes
> > special equipment for diagnosis. Sounds like you should take it to a
> > Jeep dealer, not an independent.
> >
> > ----
> >
> > On 1 Dec 2003 05:39:03 -0800, raydog153@hotmail.com (Ray) wrote:
> >
> > >The jeep is V6, auto. It ran fine every day till I let it sit for a
> > >month, now I can't get it started. Never had a starting problem. I
> > >have talked to three mechanics, and tried many things. I tried a new
> > >coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> > >position sensor). I don't get it, after I put the new CPS in it
> > >started, then I shut it off, and tried to start it again, and
> > >wouldn't. I pulled it out, made sure there was a good ground, nothing,
> > >just cranks and cranks. I tried the ground thing, made sure the block
> > >had a good ground using jumper cables still nothing. I unplugged all
> > >the connectors to everything and replugged them in, tried to start it,
> > >and it started, then shut it down and it won't start again. I did the
> > >same thing, unplugging everything, and still nothing. I got yet
> > >another CPS and tried that, still nothing, so I don't think it is
> > >that. The plugs are not firing. The timing belt is fine. Those are the
> > >only two times I have gotten it to start in over 100 tries. I have
> > >plundered the newsgroups looking for advice, the two main things I
> > >tried (grounding and CPS), and all the obvious stuff. What else could
> > >it be? When it did start up, it started up instantly. I also tried
> > >starting fluid, and am pretty sure it is not the fuel pump.
> > >
> > >Please help with advise, I hate to take it in the shop after trying
> > >all this stuff, since they will do the same stuff, or I am afraid it
> > >will work for them.
> >

Re: 93 Jeep Cherokee won't start
 

Please READ my post, as I stated in my post that one of the things I
tried was checking the ground wire and running a jumper from the block
to the battery. I also changed the CPS twice.

Ok, new info, I got the computer codes, and I had 12, 54, and 55. So
it seems like 54 is probably my problem. Is there a way to reset the
codes so I can make sure I get the same code. Would the Hall effect
sensor under the rotor cause this? I am going to pick this part up
tomorrow and try this. I did play with all the relays, swapping the
positions with the starer, and checked the fuses, so I am pretty sure
is is not a fuse or relay like the ASD.

Yes the PCM could be gone, but why would it have started those two
times? Well thanks for you help so far, I will keep looking.

"Snow" <snowball_2004@msn.com> wrote in message news:<gjLyb.3967$zf2.502753@news20.bellglobal.com> ...
> Before Mike R. say's it.. have you checked the ground wire from the engine
> block to the fire wall?? if that cable is shot it will cause similar
> symptoms. To check this, run a jumper cable from the negative terminal on
> the battery to the engine block, if jeep starts then that the problem.
>
> Snow...
>
> "----" <r------33@cableone.net> wrote in message
> news:3nmmsv4utft4todaabp0i48ui4nkfcpf0q@4ax.com...
> > First, there is no such thing as a V6 in a 1993 Jeep. It is either an
> > I-6 or a V8. The CPS seems to be the most common failure point, but
> > you have other components to consider. If the automatic shut down
> > relay (ASD) is not working, the engine will not start. The overall
> > brain of the engine is the Powertrain Control Module (PCM.) If that
> > is faulty nothing works. The PCM drives the ASD relay. The PCM takes
> > special equipment for diagnosis. Sounds like you should take it to a
> > Jeep dealer, not an independent.
> >
> > ----
> >
> > On 1 Dec 2003 05:39:03 -0800, raydog153@hotmail.com (Ray) wrote:
> >
> > >The jeep is V6, auto. It ran fine every day till I let it sit for a
> > >month, now I can't get it started. Never had a starting problem. I
> > >have talked to three mechanics, and tried many things. I tried a new
> > >coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> > >position sensor). I don't get it, after I put the new CPS in it
> > >started, then I shut it off, and tried to start it again, and
> > >wouldn't. I pulled it out, made sure there was a good ground, nothing,
> > >just cranks and cranks. I tried the ground thing, made sure the block
> > >had a good ground using jumper cables still nothing. I unplugged all
> > >the connectors to everything and replugged them in, tried to start it,
> > >and it started, then shut it down and it won't start again. I did the
> > >same thing, unplugging everything, and still nothing. I got yet
> > >another CPS and tried that, still nothing, so I don't think it is
> > >that. The plugs are not firing. The timing belt is fine. Those are the
> > >only two times I have gotten it to start in over 100 tries. I have
> > >plundered the newsgroups looking for advice, the two main things I
> > >tried (grounding and CPS), and all the obvious stuff. What else could
> > >it be? When it did start up, it started up instantly. I also tried
> > >starting fluid, and am pretty sure it is not the fuel pump.
> > >
> > >Please help with advise, I hate to take it in the shop after trying
> > >all this stuff, since they will do the same stuff, or I am afraid it
> > >will work for them.
> >

Re: 93 Jeep Cherokee won't start
 

Please READ my post, as I stated in my post that one of the things I
tried was checking the ground wire and running a jumper from the block
to the battery. I also changed the CPS twice.

Ok, new info, I got the computer codes, and I had 12, 54, and 55. So
it seems like 54 is probably my problem. Is there a way to reset the
codes so I can make sure I get the same code. Would the Hall effect
sensor under the rotor cause this? I am going to pick this part up
tomorrow and try this. I did play with all the relays, swapping the
positions with the starer, and checked the fuses, so I am pretty sure
is is not a fuse or relay like the ASD.

Yes the PCM could be gone, but why would it have started those two
times? Well thanks for you help so far, I will keep looking.

"Snow" <snowball_2004@msn.com> wrote in message news:<gjLyb.3967$zf2.502753@news20.bellglobal.com> ...
> Before Mike R. say's it.. have you checked the ground wire from the engine
> block to the fire wall?? if that cable is shot it will cause similar
> symptoms. To check this, run a jumper cable from the negative terminal on
> the battery to the engine block, if jeep starts then that the problem.
>
> Snow...
>
> "----" <r------33@cableone.net> wrote in message
> news:3nmmsv4utft4todaabp0i48ui4nkfcpf0q@4ax.com...
> > First, there is no such thing as a V6 in a 1993 Jeep. It is either an
> > I-6 or a V8. The CPS seems to be the most common failure point, but
> > you have other components to consider. If the automatic shut down
> > relay (ASD) is not working, the engine will not start. The overall
> > brain of the engine is the Powertrain Control Module (PCM.) If that
> > is faulty nothing works. The PCM drives the ASD relay. The PCM takes
> > special equipment for diagnosis. Sounds like you should take it to a
> > Jeep dealer, not an independent.
> >
> > ----
> >
> > On 1 Dec 2003 05:39:03 -0800, raydog153@hotmail.com (Ray) wrote:
> >
> > >The jeep is V6, auto. It ran fine every day till I let it sit for a
> > >month, now I can't get it started. Never had a starting problem. I
> > >have talked to three mechanics, and tried many things. I tried a new
> > >coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> > >position sensor). I don't get it, after I put the new CPS in it
> > >started, then I shut it off, and tried to start it again, and
> > >wouldn't. I pulled it out, made sure there was a good ground, nothing,
> > >just cranks and cranks. I tried the ground thing, made sure the block
> > >had a good ground using jumper cables still nothing. I unplugged all
> > >the connectors to everything and replugged them in, tried to start it,
> > >and it started, then shut it down and it won't start again. I did the
> > >same thing, unplugging everything, and still nothing. I got yet
> > >another CPS and tried that, still nothing, so I don't think it is
> > >that. The plugs are not firing. The timing belt is fine. Those are the
> > >only two times I have gotten it to start in over 100 tries. I have
> > >plundered the newsgroups looking for advice, the two main things I
> > >tried (grounding and CPS), and all the obvious stuff. What else could
> > >it be? When it did start up, it started up instantly. I also tried
> > >starting fluid, and am pretty sure it is not the fuel pump.
> > >
> > >Please help with advise, I hate to take it in the shop after trying
> > >all this stuff, since they will do the same stuff, or I am afraid it
> > >will work for them.
> >

Re: 93 Jeep Cherokee won't start
 

I would yank a pcm from a wrecking yard to test it. It sounds like you have
spent plenty on it already!
KH

"bowgus" <Bowgus@rogers.com> wrote in message
news:YTRyb.471$Y4R1.112@news04.bloor.is.net.cable. rogers.com...
> You say "the plugs are not firing" ... do you mean no spark? And if that
was
> just a typo, maybe rethink the fuel pump ... mine intermittently failed a
> few times untill it finally failed for good with the symptoms exactly as
you
> have described.
>
>
> "Ray" <raydog153@hotmail.com> wrote in message
> news:17ce08d4.0312010539.1f0e8c17@posting.google.c om...
> > The jeep is V6, auto. It ran fine every day till I let it sit for a
> > month, now I can't get it started. Never had a starting problem. I
> > have talked to three mechanics, and tried many things. I tried a new
> > coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> > position sensor). I don't get it, after I put the new CPS in it
> > started, then I shut it off, and tried to start it again, and
> > wouldn't. I pulled it out, made sure there was a good ground, nothing,
> > just cranks and cranks. I tried the ground thing, made sure the block
> > had a good ground using jumper cables still nothing. I unplugged all
> > the connectors to everything and replugged them in, tried to start it,
> > and it started, then shut it down and it won't start again. I did the
> > same thing, unplugging everything, and still nothing. I got yet
> > another CPS and tried that, still nothing, so I don't think it is
> > that. The plugs are not firing. The timing belt is fine. Those are the
> > only two times I have gotten it to start in over 100 tries. I have
> > plundered the newsgroups looking for advice, the two main things I
> > tried (grounding and CPS), and all the obvious stuff. What else could
> > it be? When it did start up, it started up instantly. I also tried
> > starting fluid, and am pretty sure it is not the fuel pump.
> >
> > Please help with advise, I hate to take it in the shop after trying
> > all this stuff, since they will do the same stuff, or I am afraid it
> > will work for them.
>
>

Re: 93 Jeep Cherokee won't start
 

I would yank a pcm from a wrecking yard to test it. It sounds like you have
spent plenty on it already!
KH

"bowgus" <Bowgus@rogers.com> wrote in message
news:YTRyb.471$Y4R1.112@news04.bloor.is.net.cable. rogers.com...
> You say "the plugs are not firing" ... do you mean no spark? And if that
was
> just a typo, maybe rethink the fuel pump ... mine intermittently failed a
> few times untill it finally failed for good with the symptoms exactly as
you
> have described.
>
>
> "Ray" <raydog153@hotmail.com> wrote in message
> news:17ce08d4.0312010539.1f0e8c17@posting.google.c om...
> > The jeep is V6, auto. It ran fine every day till I let it sit for a
> > month, now I can't get it started. Never had a starting problem. I
> > have talked to three mechanics, and tried many things. I tried a new
> > coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> > position sensor). I don't get it, after I put the new CPS in it
> > started, then I shut it off, and tried to start it again, and
> > wouldn't. I pulled it out, made sure there was a good ground, nothing,
> > just cranks and cranks. I tried the ground thing, made sure the block
> > had a good ground using jumper cables still nothing. I unplugged all
> > the connectors to everything and replugged them in, tried to start it,
> > and it started, then shut it down and it won't start again. I did the
> > same thing, unplugging everything, and still nothing. I got yet
> > another CPS and tried that, still nothing, so I don't think it is
> > that. The plugs are not firing. The timing belt is fine. Those are the
> > only two times I have gotten it to start in over 100 tries. I have
> > plundered the newsgroups looking for advice, the two main things I
> > tried (grounding and CPS), and all the obvious stuff. What else could
> > it be? When it did start up, it started up instantly. I also tried
> > starting fluid, and am pretty sure it is not the fuel pump.
> >
> > Please help with advise, I hate to take it in the shop after trying
> > all this stuff, since they will do the same stuff, or I am afraid it
> > will work for them.
>
>

Re: 93 Jeep Cherokee won't start
 

I would yank a pcm from a wrecking yard to test it. It sounds like you have
spent plenty on it already!
KH

"bowgus" <Bowgus@rogers.com> wrote in message
news:YTRyb.471$Y4R1.112@news04.bloor.is.net.cable. rogers.com...
> You say "the plugs are not firing" ... do you mean no spark? And if that
was
> just a typo, maybe rethink the fuel pump ... mine intermittently failed a
> few times untill it finally failed for good with the symptoms exactly as
you
> have described.
>
>
> "Ray" <raydog153@hotmail.com> wrote in message
> news:17ce08d4.0312010539.1f0e8c17@posting.google.c om...
> > The jeep is V6, auto. It ran fine every day till I let it sit for a
> > month, now I can't get it started. Never had a starting problem. I
> > have talked to three mechanics, and tried many things. I tried a new
> > coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> > position sensor). I don't get it, after I put the new CPS in it
> > started, then I shut it off, and tried to start it again, and
> > wouldn't. I pulled it out, made sure there was a good ground, nothing,
> > just cranks and cranks. I tried the ground thing, made sure the block
> > had a good ground using jumper cables still nothing. I unplugged all
> > the connectors to everything and replugged them in, tried to start it,
> > and it started, then shut it down and it won't start again. I did the
> > same thing, unplugging everything, and still nothing. I got yet
> > another CPS and tried that, still nothing, so I don't think it is
> > that. The plugs are not firing. The timing belt is fine. Those are the
> > only two times I have gotten it to start in over 100 tries. I have
> > plundered the newsgroups looking for advice, the two main things I
> > tried (grounding and CPS), and all the obvious stuff. What else could
> > it be? When it did start up, it started up instantly. I also tried
> > starting fluid, and am pretty sure it is not the fuel pump.
> >
> > Please help with advise, I hate to take it in the shop after trying
> > all this stuff, since they will do the same stuff, or I am afraid it
> > will work for them.
>
>

Re: 93 Jeep Cherokee won't start
 

Can't resist, neither one of you two can read...
;-)

The ground that 'can' cause those symptoms is the mesh one from the
engine block to the firewall. If that goes ratty, the PCM doesn't turn
on.

I would run the jumper cable from the battery to the firewall to check
that.

Other than that, maybe the pickup in the distributor, but usually when I
see those go, they are just plain gone.

I have also seen the hold down foot on the distributor get rusty and not
connect the distributor to ground.


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

Ray wrote:
>
> Please READ my post, as I stated in my post that one of the things I
> tried was checking the ground wire and running a jumper from the block
> to the battery. I also changed the CPS twice.
>
> Ok, new info, I got the computer codes, and I had 12, 54, and 55. So
> it seems like 54 is probably my problem. Is there a way to reset the
> codes so I can make sure I get the same code. Would the Hall effect
> sensor under the rotor cause this? I am going to pick this part up
> tomorrow and try this. I did play with all the relays, swapping the
> positions with the starer, and checked the fuses, so I am pretty sure
> is is not a fuse or relay like the ASD.
>
> Yes the PCM could be gone, but why would it have started those two
> times? Well thanks for you help so far, I will keep looking.
>
> "Snow" <snowball_2004@msn.com> wrote in message news:<gjLyb.3967$zf2.502753@news20.bellglobal.com> ...
> > Before Mike R. say's it.. have you checked the ground wire from the engine
> > block to the fire wall?? if that cable is shot it will cause similar
> > symptoms. To check this, run a jumper cable from the negative terminal on
> > the battery to the engine block, if jeep starts then that the problem.
> >
> > Snow...
> >
> > "----" <r------33@cableone.net> wrote in message
> > news:3nmmsv4utft4todaabp0i48ui4nkfcpf0q@4ax.com...
> > > First, there is no such thing as a V6 in a 1993 Jeep. It is either an
> > > I-6 or a V8. The CPS seems to be the most common failure point, but
> > > you have other components to consider. If the automatic shut down
> > > relay (ASD) is not working, the engine will not start. The overall
> > > brain of the engine is the Powertrain Control Module (PCM.) If that
> > > is faulty nothing works. The PCM drives the ASD relay. The PCM takes
> > > special equipment for diagnosis. Sounds like you should take it to a
> > > Jeep dealer, not an independent.
> > >
> > > ----
> > >
> > > On 1 Dec 2003 05:39:03 -0800, raydog153@hotmail.com (Ray) wrote:
> > >
> > > >The jeep is V6, auto. It ran fine every day till I let it sit for a
> > > >month, now I can't get it started. Never had a starting problem. I
> > > >have talked to three mechanics, and tried many things. I tried a new
> > > >coil, new plugs, new distributor, new rotor, new CPS (crankshaft
> > > >position sensor). I don't get it, after I put the new CPS in it
> > > >started, then I shut it off, and tried to start it again, and
> > > >wouldn't. I pulled it out, made sure there was a good ground, nothing,
> > > >just cranks and cranks. I tried the ground thing, made sure the block
> > > >had a good ground using jumper cables still nothing. I unplugged all
> > > >the connectors to everything and replugged them in, tried to start it,
> > > >and it started, then shut it down and it won't start again. I did the
> > > >same thing, unplugging everything, and still nothing. I got yet
> > > >another CPS and tried that, still nothing, so I don't think it is
> > > >that. The plugs are not firing. The timing belt is fine. Those are the
> > > >only two times I have gotten it to start in over 100 tries. I have
> > > >plundered the newsgroups looking for advice, the two main things I
> > > >tried (grounding and CPS), and all the obvious stuff. What else could
> > > >it be? When it did start up, it started up instantly. I also tried
> > > >starting fluid, and am pretty sure it is not the fuel pump.
> > > >
> > > >Please help with advise, I hate to take it in the shop after trying
> > > >all this stuff, since they will do the same stuff, or I am afraid it
> > > >will work for them.
> > >