Is it possible to bypass the CPS (Crankshaft Position Sensor, Crankcase Position Sensor)
01-23-2006, 08:27 PM
#31
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor, Crankcase Position Sensor)
"Erich" <rockierubicon@aol.com> wrote in message
news:1138065626.652550.104460@g43g2000cwa.googlegr oups.com...
> You might want to re-read what I wrote, I have every intention of
> fixing it for him, I am looking for some intelligent discussion on how
> to isolate or temporarily fix it for him so I don't have to be out
> working on it in the sub zero weather.
>
There isn't one. The signal is critical for the engine to operate. My "Rube
Goldberg" invention would work if i have the freq and voltage right, but is
more work than it takes to do it right.
01-23-2006, 08:36 PM
#32
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor, Crankcase Position Sensor)
Perhaps I came off a little cold, so this is my disclaimer of sort. I
am not a bad guy, I felt really bad that when my friend came to see the
truck it would not start after the first try. I told him I had the
same problem with my 87 and that I would research it so we could get it
running. I would never screw anyone over especially some one I work
with. I went out after work and bought the sensor, $35 I still don't
want to put it in until things warm up a little. Here is my original
text.
I wrote:
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
> Thanks!
am not a bad guy, I felt really bad that when my friend came to see the
truck it would not start after the first try. I told him I had the
same problem with my 87 and that I would research it so we could get it
running. I would never screw anyone over especially some one I work
with. I went out after work and bought the sensor, $35 I still don't
want to put it in until things warm up a little. Here is my original
text.
I wrote:
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
> Thanks!
01-23-2006, 08:36 PM
#33
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor, Crankcase Position Sensor)
Perhaps I came off a little cold, so this is my disclaimer of sort. I
am not a bad guy, I felt really bad that when my friend came to see the
truck it would not start after the first try. I told him I had the
same problem with my 87 and that I would research it so we could get it
running. I would never screw anyone over especially some one I work
with. I went out after work and bought the sensor, $35 I still don't
want to put it in until things warm up a little. Here is my original
text.
I wrote:
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
> Thanks!
am not a bad guy, I felt really bad that when my friend came to see the
truck it would not start after the first try. I told him I had the
same problem with my 87 and that I would research it so we could get it
running. I would never screw anyone over especially some one I work
with. I went out after work and bought the sensor, $35 I still don't
want to put it in until things warm up a little. Here is my original
text.
I wrote:
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
> Thanks!
01-23-2006, 08:36 PM
#34
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor, Crankcase Position Sensor)
Perhaps I came off a little cold, so this is my disclaimer of sort. I
am not a bad guy, I felt really bad that when my friend came to see the
truck it would not start after the first try. I told him I had the
same problem with my 87 and that I would research it so we could get it
running. I would never screw anyone over especially some one I work
with. I went out after work and bought the sensor, $35 I still don't
want to put it in until things warm up a little. Here is my original
text.
I wrote:
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
> Thanks!
am not a bad guy, I felt really bad that when my friend came to see the
truck it would not start after the first try. I told him I had the
same problem with my 87 and that I would research it so we could get it
running. I would never screw anyone over especially some one I work
with. I went out after work and bought the sensor, $35 I still don't
want to put it in until things warm up a little. Here is my original
text.
I wrote:
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
> Thanks!
01-23-2006, 11:57 PM
#35
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor, Crankcase Position Sensor)
Erich, I read that in your post, but it was just too easy a target to
resist. It's just that I instantly saw your problem as one that has no
"work-around", if the CPS quits, it's dead..
I am a mechanic and see this stuff all the time, at least in your case the
guy knows something is wrong. It is usually my sad duty to tell people what
they really bought and what the former owner did to it.
Sorry if i offended you, it was not my intention.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty
..
resist. It's just that I instantly saw your problem as one that has no
"work-around", if the CPS quits, it's dead..
I am a mechanic and see this stuff all the time, at least in your case the
guy knows something is wrong. It is usually my sad duty to tell people what
they really bought and what the former owner did to it.
Sorry if i offended you, it was not my intention.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty
..
01-23-2006, 11:57 PM
#36
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor, Crankcase Position Sensor)
Erich, I read that in your post, but it was just too easy a target to
resist. It's just that I instantly saw your problem as one that has no
"work-around", if the CPS quits, it's dead..
I am a mechanic and see this stuff all the time, at least in your case the
guy knows something is wrong. It is usually my sad duty to tell people what
they really bought and what the former owner did to it.
Sorry if i offended you, it was not my intention.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty
..
resist. It's just that I instantly saw your problem as one that has no
"work-around", if the CPS quits, it's dead..
I am a mechanic and see this stuff all the time, at least in your case the
guy knows something is wrong. It is usually my sad duty to tell people what
they really bought and what the former owner did to it.
Sorry if i offended you, it was not my intention.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty
..
01-23-2006, 11:57 PM
#37
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor, Crankcase Position Sensor)
Erich, I read that in your post, but it was just too easy a target to
resist. It's just that I instantly saw your problem as one that has no
"work-around", if the CPS quits, it's dead..
I am a mechanic and see this stuff all the time, at least in your case the
guy knows something is wrong. It is usually my sad duty to tell people what
they really bought and what the former owner did to it.
Sorry if i offended you, it was not my intention.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty
..
resist. It's just that I instantly saw your problem as one that has no
"work-around", if the CPS quits, it's dead..
I am a mechanic and see this stuff all the time, at least in your case the
guy knows something is wrong. It is usually my sad duty to tell people what
they really bought and what the former owner did to it.
Sorry if i offended you, it was not my intention.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty
..
01-25-2006, 02:19 PM
#38
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor,Crankcase Position Sensor)
I have found that in most cases, it is only a dirty connection on the
CPS. The plug sits on top of the manifold at the back. WD40 will work
to clean it, but the best is a spray contact cleaner for electronics.
The other sneaky one that will cause your symptoms bit my 88 after I
changed the CPS for nothing when the plug clean didn't work is a bad
ground strap from the back of the engine head to the firewall. These go
ratty easy and the body can steal some ground, but not enough to be
stable.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
Erich wrote:
>
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
>
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
>
> Thanks!
CPS. The plug sits on top of the manifold at the back. WD40 will work
to clean it, but the best is a spray contact cleaner for electronics.
The other sneaky one that will cause your symptoms bit my 88 after I
changed the CPS for nothing when the plug clean didn't work is a bad
ground strap from the back of the engine head to the firewall. These go
ratty easy and the body can steal some ground, but not enough to be
stable.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
Erich wrote:
>
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
>
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
>
> Thanks!
01-25-2006, 02:19 PM
#39
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor,Crankcase Position Sensor)
I have found that in most cases, it is only a dirty connection on the
CPS. The plug sits on top of the manifold at the back. WD40 will work
to clean it, but the best is a spray contact cleaner for electronics.
The other sneaky one that will cause your symptoms bit my 88 after I
changed the CPS for nothing when the plug clean didn't work is a bad
ground strap from the back of the engine head to the firewall. These go
ratty easy and the body can steal some ground, but not enough to be
stable.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
Erich wrote:
>
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
>
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
>
> Thanks!
CPS. The plug sits on top of the manifold at the back. WD40 will work
to clean it, but the best is a spray contact cleaner for electronics.
The other sneaky one that will cause your symptoms bit my 88 after I
changed the CPS for nothing when the plug clean didn't work is a bad
ground strap from the back of the engine head to the firewall. These go
ratty easy and the body can steal some ground, but not enough to be
stable.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
Erich wrote:
>
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
>
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
>
> Thanks!
01-25-2006, 02:19 PM
#40
Guest
Posts: n/a
Re: Is it possible to bypass the CPS (Crankshaft Position Sensor,Crankcase Position Sensor)
I have found that in most cases, it is only a dirty connection on the
CPS. The plug sits on top of the manifold at the back. WD40 will work
to clean it, but the best is a spray contact cleaner for electronics.
The other sneaky one that will cause your symptoms bit my 88 after I
changed the CPS for nothing when the plug clean didn't work is a bad
ground strap from the back of the engine head to the firewall. These go
ratty easy and the body can steal some ground, but not enough to be
stable.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
Erich wrote:
>
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
>
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
>
> Thanks!
CPS. The plug sits on top of the manifold at the back. WD40 will work
to clean it, but the best is a spray contact cleaner for electronics.
The other sneaky one that will cause your symptoms bit my 88 after I
changed the CPS for nothing when the plug clean didn't work is a bad
ground strap from the back of the engine head to the firewall. These go
ratty easy and the body can steal some ground, but not enough to be
stable.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
Erich wrote:
>
> I checked for previous topics on this but I did not find one about
> bypassing the CPS. I am selling my 88 Comanche and wouldn't you know
> the damned thing will only start cold, one time and thats it. My
> experience with my 87 tells me its the CPS. I would love to just
> bypass the thing so I can sell it, or at least so I can tell the guy
> buying it that this is what the problem is. He is a friend of mine and
> I am giving him a deal but he is not mechanically inclined so I will
> end up fixing it for him anyway but I would like to wait for spring
> when its a little warmer than 10 degrees outside.
>
> By the way I am new to the group! My name is Erich I live in the
> Rockies and I have had a number of Jeeps over the past 25 years. My
> wife just bought me a 2006 Unlimited so I am learning all about Jeeps
> again.
>
> Thanks!
