1994 YJ Help! Is the computer the problem
12-31-2005, 12:57 PM
#31
Guest
Posts: n/a
Re: 1994 YJ Help! Is the computer the problem
Its fixed!
It was an intermittent Crank Position Sensor.
It didn't set a code and tests with an ohm meter were within spec.
Since it was the cheapest of all fixes in my current list of guesses I
figured I would try a new one anyway.
Went to the parts store got a cheap after market - figured it would
work well enough.
Crawled under the jeep with my socket wrench.
Now for the interesting part, when I went to loosen the bolts, those
bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
lbs. of torque suggested. Once I got the CPS out I found very slight
scores on the face. Not knowing the tolerances between the sensor and
the flywheel, I can only guess that it had contacted the flywheel at
some point.
Since these things seem to be really sensitive, I suspect because the
sensor was loose it would move out of position. Then the computer
couldn't figure out what was going on. I can't explain why it seemed
to be only after it warmed up (all but one time).
One good thing did come out of all this, my jeep has NEVER run as good
as it is running right now. I have a hard time not turning the tires
over at the stop signs. I don't know if I am just not use to all this
new power or that there is a 1/4 inch of ice on everything up here in
Vermont ;)
Hope I am able to return the favor some day.
GoodOnYa...! All
It was an intermittent Crank Position Sensor.
It didn't set a code and tests with an ohm meter were within spec.
Since it was the cheapest of all fixes in my current list of guesses I
figured I would try a new one anyway.
Went to the parts store got a cheap after market - figured it would
work well enough.
Crawled under the jeep with my socket wrench.
Now for the interesting part, when I went to loosen the bolts, those
bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
lbs. of torque suggested. Once I got the CPS out I found very slight
scores on the face. Not knowing the tolerances between the sensor and
the flywheel, I can only guess that it had contacted the flywheel at
some point.
Since these things seem to be really sensitive, I suspect because the
sensor was loose it would move out of position. Then the computer
couldn't figure out what was going on. I can't explain why it seemed
to be only after it warmed up (all but one time).
One good thing did come out of all this, my jeep has NEVER run as good
as it is running right now. I have a hard time not turning the tires
over at the stop signs. I don't know if I am just not use to all this
new power or that there is a 1/4 inch of ice on everything up here in
Vermont ;)
Hope I am able to return the favor some day.
GoodOnYa...! All
12-31-2005, 02:02 PM
#32
Guest
Posts: n/a
Re: 1994 YJ Help! Is the computer the problem
aj did pass the time by typing:
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested.
14ft.lbs actually isn't that much torque. It's about what you use to set
spark plugs.
> Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
The tolerance is set by a bit of cardboard that's usually stuck to the
face of the sensor. Some have it, some don't. The ones that don't have
bolt holes that have no slop. I have no idea what the spec is on that
sensor.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
When the computer moves from warm-up to operate mode it uses different
sensors. It could be that what ever the problem was that switch in
operation masked most of it.
Good to know. Glad you got it fixed.
That dang CPS sensor is the most common issue with Jeep it seems.
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
It's that lead brick attached to your right foot. :)
--
DougW
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested.
14ft.lbs actually isn't that much torque. It's about what you use to set
spark plugs.
> Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
The tolerance is set by a bit of cardboard that's usually stuck to the
face of the sensor. Some have it, some don't. The ones that don't have
bolt holes that have no slop. I have no idea what the spec is on that
sensor.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
When the computer moves from warm-up to operate mode it uses different
sensors. It could be that what ever the problem was that switch in
operation masked most of it.
Good to know. Glad you got it fixed.
That dang CPS sensor is the most common issue with Jeep it seems.
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
It's that lead brick attached to your right foot. :)
--
DougW
12-31-2005, 02:02 PM
#33
Guest
Posts: n/a
Re: 1994 YJ Help! Is the computer the problem
aj did pass the time by typing:
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested.
14ft.lbs actually isn't that much torque. It's about what you use to set
spark plugs.
> Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
The tolerance is set by a bit of cardboard that's usually stuck to the
face of the sensor. Some have it, some don't. The ones that don't have
bolt holes that have no slop. I have no idea what the spec is on that
sensor.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
When the computer moves from warm-up to operate mode it uses different
sensors. It could be that what ever the problem was that switch in
operation masked most of it.
Good to know. Glad you got it fixed.
That dang CPS sensor is the most common issue with Jeep it seems.
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
It's that lead brick attached to your right foot. :)
--
DougW
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested.
14ft.lbs actually isn't that much torque. It's about what you use to set
spark plugs.
> Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
The tolerance is set by a bit of cardboard that's usually stuck to the
face of the sensor. Some have it, some don't. The ones that don't have
bolt holes that have no slop. I have no idea what the spec is on that
sensor.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
When the computer moves from warm-up to operate mode it uses different
sensors. It could be that what ever the problem was that switch in
operation masked most of it.
Good to know. Glad you got it fixed.
That dang CPS sensor is the most common issue with Jeep it seems.
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
It's that lead brick attached to your right foot. :)
--
DougW
12-31-2005, 02:02 PM
#34
Guest
Posts: n/a
Re: 1994 YJ Help! Is the computer the problem
aj did pass the time by typing:
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested.
14ft.lbs actually isn't that much torque. It's about what you use to set
spark plugs.
> Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
The tolerance is set by a bit of cardboard that's usually stuck to the
face of the sensor. Some have it, some don't. The ones that don't have
bolt holes that have no slop. I have no idea what the spec is on that
sensor.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
When the computer moves from warm-up to operate mode it uses different
sensors. It could be that what ever the problem was that switch in
operation masked most of it.
Good to know. Glad you got it fixed.
That dang CPS sensor is the most common issue with Jeep it seems.
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
It's that lead brick attached to your right foot. :)
--
DougW
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested.
14ft.lbs actually isn't that much torque. It's about what you use to set
spark plugs.
> Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
The tolerance is set by a bit of cardboard that's usually stuck to the
face of the sensor. Some have it, some don't. The ones that don't have
bolt holes that have no slop. I have no idea what the spec is on that
sensor.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
When the computer moves from warm-up to operate mode it uses different
sensors. It could be that what ever the problem was that switch in
operation masked most of it.
Good to know. Glad you got it fixed.
That dang CPS sensor is the most common issue with Jeep it seems.
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
It's that lead brick attached to your right foot. :)
--
DougW
12-31-2005, 02:53 PM
#35
Guest
Posts: n/a
Re: 1994 YJ Help! Is the computer the problem
Thanks for telling us.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
aj wrote:
>
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested. Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
>
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
>
> Hope I am able to return the favor some day.
> GoodOnYa...! All
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
aj wrote:
>
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested. Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
>
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
>
> Hope I am able to return the favor some day.
> GoodOnYa...! All
12-31-2005, 02:53 PM
#36
Guest
Posts: n/a
Re: 1994 YJ Help! Is the computer the problem
Thanks for telling us.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
aj wrote:
>
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested. Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
>
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
>
> Hope I am able to return the favor some day.
> GoodOnYa...! All
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
aj wrote:
>
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested. Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
>
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
>
> Hope I am able to return the favor some day.
> GoodOnYa...! All
12-31-2005, 02:53 PM
#37
Guest
Posts: n/a
Re: 1994 YJ Help! Is the computer the problem
Thanks for telling us.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
aj wrote:
>
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested. Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
>
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
>
> Hope I am able to return the favor some day.
> GoodOnYa...! All
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
aj wrote:
>
> Its fixed!
> It was an intermittent Crank Position Sensor.
> It didn't set a code and tests with an ohm meter were within spec.
> Since it was the cheapest of all fixes in my current list of guesses I
> figured I would try a new one anyway.
> Went to the parts store got a cheap after market - figured it would
> work well enough.
> Crawled under the jeep with my socket wrench.
> Now for the interesting part, when I went to loosen the bolts, those
> bolts turned Real easy. Not finger tight but it sure wasn't the 14 ft.
> lbs. of torque suggested. Once I got the CPS out I found very slight
> scores on the face. Not knowing the tolerances between the sensor and
> the flywheel, I can only guess that it had contacted the flywheel at
> some point.
> Since these things seem to be really sensitive, I suspect because the
> sensor was loose it would move out of position. Then the computer
> couldn't figure out what was going on. I can't explain why it seemed
> to be only after it warmed up (all but one time).
>
> One good thing did come out of all this, my jeep has NEVER run as good
> as it is running right now. I have a hard time not turning the tires
> over at the stop signs. I don't know if I am just not use to all this
> new power or that there is a 1/4 inch of ice on everything up here in
> Vermont ;)
>
> Hope I am able to return the favor some day.
> GoodOnYa...! All
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